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EK-861AB-OP-001

November 1976

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Document:	861-A,-B,-C,-D,-E,-F Power Controller User's Manual
Order Number:	EK-861AB-OP
Revision:	001
Pages:	23
Original Filename:	http://bitsavers.org/pdf/dec/powerSupply/EK-861AB-OP-001_861-A_B_C_D_E_F_Power_Controller_Users_Manual_Nov76.pdf

OCR Text

861-A, -8, -C, -0, -E, -F
power controller
user's manual

'-------digital equipment corporation· maynard, massachusetts-----. . . .

861-A, -8, -C, -0, -E, -F
power controller
user's manual

E K-861 AB-OP-001

digital equipment corporation • maynard, massachusetts

1st Edition, November 1976

Copyright © 1976 by Digital Equipment Corporation
The material in this manual is for informational
purposes and is subject to change without notice.
Digital Equipment Corporation assumes no responsibility for any errors which may appear in this
manual.
Printed in U.S.A.

The following are trademarks of Digital Equipment
Corporation, Maynard, Massachusetts:
DEC
DECCOMM
DECsystem-l0
DECSYSTEM-20

DECtape
DECUS
DIGITAL
MASSBUS

PDP
RSTS
TYPESET-8
TYPESET-11
UNIBUS

12/77-14

CONTENTS
Page
CHAPTER 1

INTRODUCTION

1.1
1.2
1.2.1
1.2.2

GENERAL DESCRIPTION
SPECIFICATIONS . . . . . . . . .
Mechanical and Environmental
Electrical . . . . . . . . . . .

CHAPTER 2

INSTALLATION

2.1
2.2
2.2.1
2.2.2
2.2.3
2.3
2.4

SITE CONSIDERATIONS . . . . . . . .
CABLES . . . . . . . . . . . . . . . . .
........... .
Input Power
Remote Switching Control
Output Power .. . . . . . .
GROUNDING . . . .
. ... .
INITIAL OPERATION
..... .

. . . ..

1-1
1-1
1-3
1-3

2-1
2-1
2-1

........

24
24
24
24

CHAPTER 3

OPERATION

3.1
3.1.1
3.1.2
3.1.3
3.1.4
3.1.5
3.1.6

CONTROLS AND INDICATORS
Pilot I..amps . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . .
Circuit Breaker . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . .
LOCAL/OFF/REMOTE Switch
..............
. . . . . .
Remote Switching Control Bus Connectors . . . . . . . .
Power Outlets . . . . . . . . . .
. . . . . . . . . .
Overtemperature Switch

3-1
3-1
3-1
3-1
3-1

34
34

ILLUSTRATIONS
Figure No.
1-1
1-2
2-1
2-2

3-1
3-2
3-3

Title
Simplified Block Diagram - 861-A,-B,-C,-F
Simplified Block Diagram - 861-D,-E ..
Connector Wiring
............ .
.......... .
Signal Bus Connector
Type 861-A,-B,-C Power Controller Panels
Type 861-D,-E Power Controller Panels
Type 861-F Power Controller Panel

Page

1-2
1-2
2-3

24
3-2

3-3
34

TABLES
Table No.

2-1

2-2

Title

Page

2-2

.....
Input Power Cables
Input Power Cable Connectors

2-2

iii

861-A,-B,-C,-D,-E,-F POWER CONTROLLER

861-A,-B,_C,_F Power COntroller

. 861-D,_E Power COntroller

1510_1

CHAPTER 1
INTRODUCTION

This manual provides information for installing and
operating the 861-A, 861-B, 861-C, 861-D, 861-E,
and 861-F Power Controllers, designed and manufactured by Digital Equipment Corporation.

Figures I-I and 1-2 are simplified block diagrams
of the 861 Power Controllers. Four basic functions
are performed:

1.1 GENERAL DESCRIPTION
The 861 Power Controllers provide a means for controlling and distributing power to data processing
equipment.

All versions are contained on panels intended for
mounting in racks or cabinets that accept standard
19-inch panels. Each power controller requires 53/16 inches of vertical mounting space. The 861-A,B,-C,-F extends 8-1/4 inches into the mounting
rack or cabinet and the 861-D,-E extends 11 inches
into the mounting rack or cabinet.

Control of large amounts of power by
control signals of small power content.

Convenient distribution of primary
power to controlled devices.

Filtering of primary power to controlled
devices.

A utomatic removal of primary power
from controlled devices in case of overload or overtemperature conditions.

1.2 SPECIFICATIONS
The following specifications are included here for
reference purposes only and are subject to change
without notice.

The following versions are available to provide for
a variety of input power configurations:

Version

Voltage

Hertz

Phase

861-A

90-135

47-63

Two (120 0 or 180 0 displaced)

861-8

180-270

47-63

Single

861-C

90-135

47-63

Single

861-D

90-132

47-63

Three (120 0 displaced)

861-E

180-264

47-63

Three (120 0 displaced)

861-F

90-135

47-63

Single

I-I

r---

UNSWITCHED
OUTLETS

AC
LINE ~ PILOT t--- CIRCUIT I--I--BREAKER
INPUT
FI L 'fER
LAMPS

' - - RELAY t---

REMOTE
OFF
LOCAL
SWITCH

SPIKE
SUPPRESS ION
CI RCUIT

SWITCHED
OUTLETS

1
f4-- POWER REQUEST
PILOT
CONTROL f4-- EMERGENCY SHUTDOWN
CIRCUIT
I--- COMMON

S
THERMAL
SWITCH

CP-0354

Figure 1-1

Simplified Block Diagram - 861-A,-B,-C,-F

PILOT
LIGHTS
r---

15'SJT
CORD *
AC
INPUT

TWIST
PLUG*

HLr FILTER
'LINE

f-'-

CIRCUIT
BREAKER >---

REMOTE
OFF
LOCAL
SWITCH

CONTACTOR -

SPI KE
SUPPRESS ION, I--CI RCU IT

TEN
SWITCHED
OUTLETS

1----",-1
L
,I

THERMAL
SWITCH

*NOTE:
Not supplied
with 861-E

FOUR
UNSW ITCHED
OUTLETS

4 - - POWER REQUEST
PILOT
CONTROL 4 - - EMERGENCY SHUTDOWN
CIRCUIT
4 - - COMMON

CP-1735

Figure 1-2

Simplified Block Diagram - 861-D,-E

1-2

1.2.1

Frequency
47 Hz - 63 Hz

Mechanical And Environmental

Dimensions.
861-A,-B,-C,-F: 5 in. h x 19-1/8 in. w x 8 in.
d (12.7 cm h x 48.5 cm w x 20.3 cm d)

Current
861-A: 16A per pole; 861-B: 16A per
pole; 861-C: 24A per pole; 861-D: 24A
per pole; 861-E: 15A per pole; 861-F:
12A per pole.

861-D,-E,: 5 in. h x 19-1/8 in. w x 11 in. d
(12.7 cm h x 48.5 cm w x 27.9 cm d)
Weight
861-A,-B,-C,-F: 10 lb (4.54 kg) (approx)
861-D,-E: 27 lb (12.26 kg) (approx)

Power Requirements
Full Load
861-A: 3830 VA; 861-B: 3830 VA; 861C: 2870 VA; 861-D: 8640 VA; 861-E:
10,800 VA; 861-F: 1435 VA

Cooling Method
Convection

No Load
861-A,-B,-C,-D,-E,-F: 10 VA

Mounting
Rack (standard 19 in.)

I nrush Current Capability
240 A peak, 1 cycle

Ambient Temperature
Operating
861-A,-B,-C,-F: 0 0 to +60 0 C

Leakage Current
861-0: 1.75 rnA max. 861-E: 3.5 rnA max.

861-D,-E: 0 0 to +70 0 C

Input Overvoltage Transient
180/360 V, I sec (power controller alone)

Storage
-40 0 to 71 0 C

Activate Time
20 ms (from switch closing to power out)

Relative Humidity
95% max (no condensation)

Deactivate Time
10 ms (from switch opening to power out)

Altitude
861-A,-B,-C,-F: 10,000 ft (max)
861-D,-E: 8000 ft (max)
1.2.2

I nput Breaker
861-A,-B,-C: 20 A delayed action, manual reo
set, magnetic
861-0: 30 A delayed action, manual reset,
magnetic
861-E: 15 A delayed action, manual reset,
magnetic
861-F: 10 A delayed action, manual reset,
magnetic

Electrical

Input Power
Voltage
861-A,-C,-F: 90 Vac - 135 Vac; 861-B:
180 Vac - 270 Vac; 861-D: 90 Vac - 132
Vac; 861-E: 180 Vac - 264 Vac
Phase
861-A: Two (120 0 or 180 0 displaced);
861-B,-C,-F: Single; 861-D,-E: Three
(120 0 displaced)

Thermoswitch
Opens at 160°F, automatically resets at 120°
F, 49 0 C (exposed to ambient air external to
controller)

1-3

I nput Power Connector
861-A: 4-prong twist plug, NEMA* LI4-20P;
861-B: 3-prong twist plug NEMA L6-20P;
861-C: 3-prong twist plug NEM A L5-30P;
861-D: 5-prong twist plug, NEMA L21-30P;
861-E: pressure fit terminal block;
861-F: 3-prong standard plug NEMA L5-15P.

Capacitance
200 pF (max)
Output (861-A,-B,-C,-F)
Outlets (power)
Twelve (8 switched, 4 unswitched)
Outlet Current Rat.ings
861-A: 12 A per outlet, 16 A per branch
circuit~ 32 A total; 861-B: 12 A per outlet, 16 A total; 861-C: 12 A per outlet,
16 A per branch circuit, 24 A total; 861F: 6 A per outlet, 8 A per branch circuit, 12 A total.

Hipot
2.1 kV dc for 60 sec (input and output to
chassis).
Remote Switching Control Connectors
3 each: Female, AMP 1-480304-0 (DEC-12
09350-03) with AMP 61117-4 (DEC-12-09379)
pins or equivalent that mate with AMP 1480305-0 (DEC-12-0935I) with AMP 61118-4
(OEC-12-09378) pins or equivalent

Outlet I nrush Current
861-A: 240 A peak per branch circuit (1
cycle), 480 A peak total (1 cycle); 861-B:
240 A peak total ( 1 cycle); 861-C: 240 A
peak per branch circuit (1 cycle), 360 A
peak total (1 cycle); 861-F: 120 A peak
per branch circuit (1 cycle), 180 A peak
total ( I cycle).

Input Signal Current Levels
861-A,-B,-C,-F: 0.5 rnA (min), 10 rnA (max);
861-0,-E: 0.5 rnA (min), 40 rnA (max) load
worst case to each bus signal line when connected to pin 3.

Output (861-0,-E)
Outlets (power)
Fourteen (10 switched, 4 unswitched)

I nput Signal Voltage Levels
861-A,-B,-C,-F: 3.0 V max = low; +35 V min
= high (open circuit = high); 861-D,-E: +3.0
V max = low; + 32 V min = high. Worst case
to each bus signal line in relation to pin 3.

Outlet Current Ratings
861-0: 15 A per outlet, 24 A per phase,
72 A total; 861-E: 12 A per outlet, 15 A
per phase, 45 A total.

Bus Signal Line Overload Capability
125 Vac rms @ 60 Hz, 13 kQ impedance in relation to pin 3 for two seconds with no
damage

Outlet Inrush Current
240 A peak per branch circuit ( 1 cycle)

All provisions of Underwriters Laboratories Specification UL-478 have been met in the design and
manufacture of the 861-A, 861-B, 861-C, 861-0,
861-E and 861-F Power Controllers.

Power Control Impedance
Inductive (diode suppressed)

*National Electrical Manufacturer's Association

1-4

CHAPTER 2
INSTALLATION

2.1

SITE CONSIDERATIONS

These cable assemblies are described in the following paragraphs.

The dimensions of the 861-A,-B,-C, and -F Power
Controllers are identical. Each is contained on a
19-inch panel intended for mounting on a rack or
in a cabinet that accepts standard 19-inch panels.
Each power controller requires 5-1/4 inches of vertical mounting space and extends approximately 8
inches into the mounting rack or cabinet. For convenience, the power controller should be mounted
as close as feasible to the units it controls.

2.2.1 Input Power
The type of input power cable depends on which
version of the power controller is being installed.
Table 2-1 describes the input power cables. Cables
supplied are 15 feet in length and are composed of
insulated stranded conductors. (Cables with a
grounded shield braid are recommended for
EMI/RFI protection.)

The dimensions of the 861-0 and -E Power Controllers are identical. Each is contained on a 19inch panel intended for mounting on a rack or in a
cabinet that accepts standard 19-inch panels. Each
power controller req uires 5-1/4 inches of vertical
mounting space and extends approximately II
inches into the mounting rack or cabinet. For convenience, the power controller should be mounted
as close as feasible to the units it controls.

The power cable connector types' provided also
differ depending upon which 861 version is being installed. Table 2-2 lists the plug and receptacle types
with NEMA and DEC designations. Figure 2-1
shows the power connector outlines and provides
color coding information.

Ambient temperature at the installation site should
not exceed +60°C; for the 861-A,-B,-C,-F or +70°
C for the 861-D,-E; relative humidity should remain below 95 percent, with no condensation. For
other environmental particulars, refer to Paragraph
1.2.

2.2

The input power cable connects to the 4-terminal
block at the side of the line filter. In 861-A installations, the following connections must be made:
a.
b.
c.
d.

CABLES

Each power controller requires the following cables:
a.

Input Power (provided with 861-A,-B,C,-D,-F only)

Green - N (Earth Ground)
Black - C (Phase 2)
White - B (Neutral)
Red - A (Phase I)

In 861-B installations the following connections
must be made:

Remote Switching Control, DEC No.
70-08288, 70-10695, or equivalent (not
provided)

a.
b.
c.
d.

Output Power (provided with controlled
units)

2-1

Green - N (Earth Ground)
White - B (Phase or Neutral)
Black - C (Phase or Neutral)
No Connection - A

Table 2-1
Input Power Cables
Controller

Conductors

Size

861-A
861-8
861-C
861-0
861-E

4
3
3
5
5

#12 AWG
#14 AWG
#12 AWG
#10 AWG
#14 AWG
(Shielded)

Green, black, white, red
Green, black, white
Green, black, white
Green/yellow, black, white, red, orange
Green/Yellow, black, black, brown, blue (not provided)

861-F

#14 AWG

Green, black, white

Coding

Table 2-2
Input Power Cable Connectors
NEMA No.

DEC No.

861-A

4-Prong Twist Plug
4-Prong Twist Receptacle

L14-20P
L14-20R

12-11045
12-11046

861-8

3-Prong Twist Plug
3-Prong Twist Receptacle

L6-20P
L6-20R

12-11192
12-11191

861-C

3-Prong Twist Plug
3-Prong Twist Receptacle

L5-30P
L5-30R

12-11193
12-11194

861-0

5-Prong Twist Plug
5-Prong Twist Receptacle

L21-30P
L21-30R

12-12314
12-12315

861-E
861-F

(Not provided)
3-Prong Plug

L5-15P

90-08938

3-Prong Receptacle

L5-15R

12-05351

2-2

PLUG

RECEPTACLE

RED

PHASE 1

WHITE

GREEN
EARTH
GROUND

NEUTRAL

PHASE 2

NEMA L14-20R

WHITE

BLACK

GREEN

NEMA L14 -20P
U/W 861-A

U/W 861-A

PHASE OR
NEUTRAL
(NEUTRAL
PREFERRED)

WHITE

PHASE OR

BLACK

GREEN

EARTH
GROUND

NEUTRAL
NEMA L6-20R

NEMA L6 - 20P

U/W 861- B

U/W861-B

WHITE

NEUTRAL

GREEN
BLACK

PHASE

EARTH
GROUND

WHITE

NEUTRAL

GREEN

NEMA L5-30R

NEMA L5-30P

U/W861-C

U/W 861-C

4>1

BLACK

4>2

GREEN/YELLOW

RED

WHITE

ORANGE

NEMA L21-30P
U/W 861-0

4>3
NEMA L21- 30R
U/W 861-0
GREEN

BLACK

GREEN

WHITE

BLACK

NEMA L5-15P
U/W 861-F

NEMA L5-15R
U/W 861-F

11-3202

Figure 2-1

Connector Wiring

2-3

In 86 I -C,-F installations, the following connections
must be made:
a.
b.
c.

POWER REQUEST

Green - N (Earth Ground)
White - A (Neutral)
Black - B (Phase)

EMERGENCY SHUTDOWN

SIGNAL RETURN

In 86 I-0 installations, the following connections
must be made:
CP-0355

a.
b.
c.
d.
e.

Green/yellow - N (Earth Ground)
Black - (Phase I)
White - (Neutral)
Red - (Phase 2)
Orange - (Phase 3)

Figure 2-2

switched, 4 unswitched). Power cables must be terminated with standard 3-prong male connectors
(NEMA 5-15P for the 861-A,-C,-F and NEMA 615P for 861-B) to mate with the female connectors
(NEMA 5-15R for the 861-A,-C,-F and NEMA 615R for 861-B) on the panel.

NOTE
The 861-E Power Controller is not supplied with an
ac power cord and connector. It is shipped with a
strain relief installed. Local electrical codes should be
referenced for the size and type of power cord and
connector used.

Power for the 861-0,-E is provided to controlled
units from the 14 convenience outlets (10 switched,
4 unswitched). Power cables must be terminated
with standard 3-prong male connectors (NEMA515P or 5-20P for the 861-0 and NEMA 6-15P -for
the 86 I-E) to mate with the female connectors
(NEMA 5-15R or 5-20R for the 861-0 and NEMA
6-15R for the 861-E) on the panel.

2.2.2 Remote Switching Control
Three female bus connectors, wired in parallel, are
provided on the front panel for accepting and rerouting the Remote Switching Control Bus. Each is
an AMP Mate-N-Lok type AMP 1-480304-0 (DEC12-0-350-3) with AMP G117-4 (OEC-12-09379) pins
or equivalent.

2.3 GROUNDING
A good return ground is essential to proper power
controller operation. A secure electrical connection
must exist between the controller and the frame of
the associated rack or cabinet. To accomplish this,
(861-A,-B,-C,-F) use a 10-32 nut with serrated
washer and a 10-32 bolt with serrated washer in at
least one of the four mounting holes. For the 861O,-E, use a serrated washer and a 10-32 bolt with
serrated washer in a 10-32 press nut on the rear of
the controller.

Connections between units are effected with from
one to three cable assemblies of 3-conductor stranded #22 A WG cable terminated at each end with
male connectors. These are AMP 1-480305 (OEC12-09351) with AMP 61118-4 (OEC-12-09378) pins
or equivalent. Cable assembly details are shown on
drawing OEC-70-08288. Color coding is as follows:
a.
b.
c.

Signal Bus Connector

Pin I - Red
Pin 2 - Black
Pin 3 - Green

2.4 INITIAL OPERATION
Before applying primary power to the power controller, determine that the power at the mains is of
the correct value for the particular 861 version
being installed and that all cables are connected
correctly.

Remote Switching Control Bus lines connect the
Signal Return, Power Request, and Emergency
Shutdown lines from the processor and system devices to the power controller in systems employing
compatible automatic control features. These lines
are low for assertion. Figure 2-2 shows one female
connector viewed from the front.

NOTE
If the controller is being installed in a system where
the Emergency Shutdown and Power Request lines
are not in use, the LOCAL/OFF/REMOTE switch
must be in the LO CAL position.

2.2.3 Output Power
Power for the 861-A,-B,-C,-F is provided to controlled units from the 12 convenience outlets (8

2-4

In systems where the Emergency Shutdown and
Power Request lines (or their equivalents) are to be
Jsed, provisions must exist for connecting pin 1 to
pin 3 when normal operation is desired (power is
supplied to the controlled devices through the
switched outlets). Provision must also exist for connecting pin 3 to pin 2 if an Emergency Shutdown
feature is to be implemented.

rect for the power controller in use, the power controller should be shut down, the loads connected to
the switched and unswitched outlets*, and the circuit
breaker(s) thrown ON again. The system should
now operate. If the circuit breaker trips, or other
abnormality exists, refer to the maintenance information in Chapter 5 of the 861-A-F Power Controller
Maintenance Manual.
I f the Emergency Shutdown feature is in use, check
that the power controller responds properly to shutdown requests from each external device.

Once it has been determined that correct power exists at the mains and that all cabling is correct, and
before connecting any devices to the power outlets,
connect the controller power plug to the appropriate receptacle. All pilot lamps on the panel should
light. The circuit breaker(s) on the panel should be
thrown to the ON position and the LOCAL/OFF /REMOTE switch to the LOCAL position. Measure the voltage at the switched and
unswitched outlets. If the measured values are cor-

Also, if required, the operation of the thermally-activated overtemperature switch can be checked by
holding a match in proximity to the sensing element and observing that the switched outlets are
disabled. The thermal switch should reset automatically after a brief period, once the flame is
removed.

*Loads should be balanced between circuits.

2-5

CHAPTER 3
OPERATION

The following are the outlet current ratings:

3.1 CONTROLS AND INDICATORS
Figure 3-1 shows the front panels for the 861-A,
861-B and 861-C Power Controllers. Each version
has two pilot lamps, a circuit breaker, a 3-position
toggle switch, and several power outlets. Their functions are discussed in the following paragraphs.

Version
681-A
681-8
86J-C
861-0
861-E
861-F

Figure 3-2 shows the front and back panels for the
861-0 and 861-E Power Controllers. Each version
has three pilot lamps, a main circuit breaker, a 3position toggle switch, and several power outlets. In
addition, the 861-0 has six branch circuit breakers.
Their functions are discussed in the following
paragraphs.
Figure 3-3 shows the front panel for the" 861-F
Power Controller. Controls, indicators and outlets
are the same as for the 861-C.

Per Outlet Per Branch/Phase
12A
12A
12A
15A
12A
6A

16A
16A
16A
24A
15A
8A

Total
32A
16A
24A
72A
45A
12A

3.1.3 LOCAL/OFF/REMOTE Switch
The LOCAL/OFF/REMOTE switch provides the
Remote Switching Bus with the means to control
the power to the switched outlets. When the power
controHer is energized and the switch is in the OFF
position, the switched outlets are disabled. When in
the REMOTE position and connected to a bus
where Power Request and Emergency Shutdown
are in use (or a means of effecting connection between pin 3 and pins 1 or 2 exists), the switched
outlets are enabled or disabled in accordance with
conditions on the bus. When in the LOCAL position, the switched outlets are enabled only when the
Emergency Shutdown signal is not asserted.

3.1.1 Pilot Lamps
In all 861 Power Controller versions, all pilot lamps
are lighted whenever the controller input power
cable is connected to the live mains, regardless of
the position of the power controller circuit breaker
or LOCAL/OFF/REMOTE switch.
3.1.2 Circuit Breaker
Circuit breaker CB 1, when ON, provides power to
the unswitched outlets, and to the switched outlets
when the LOCAL/OFF/REMOTE switch is in the
LOCAL position (or in the REMOTE position and
a connection exists between pins 1 and 3 of a Remote Switching Control Bus connector*). The circuit
breaker opens automatically when an overload condition exists at a power outlet or within the power
controller.

3.1.4 Remote Switching Control Bus Connectors
The three female Signal Bus connectors, adjacent to
the LOCAL/OFF/REMOTE switch, are wired in
parallel. These connectors provide a means of
daisy-chaining the Remote Switching Control Bus
between the controller and system devices.

*A connection between pins 2 and 3 of the Remote Switching
Control Bus disables the switched outlets, regardless of the position of the LOCAL/OFF/REMOTE switch.

3-1

CIRCUIT
TWO

SWITCHED
CIRCUIT
CIRCUIT
TWO
ONE

REMOTE
LOCAL
ON
OFF
ON

CIRCUIT
ONE

CP-0376

861-A

SWITCHED

POWER CONTROL 8618
INPUT 240V 50-60 HZ
2 POLE 3 WI RE 16A

REMOTE
LOCAL
ON
OFF
ON

UNSWITCHED

CP-0375

861-B

CIRCUIT
TWO

SWITCHED
CIRCUIT
CIRCUIT
ONE
TWO

CIRCUIT
ONE

POWER CONTROL 861C
INPUT 120V 50-60 HZ
2 POLE 3 WIRE 24A

REMOTE
LOCAL
ON
OFF
ON

CP-0374

861-C

Figure 3-1

Type 861-A,-B,-C Power Controller Panels

3-2

(!)

PHASE I-CIRCUIT I
UNSWITCHED

861-0 (Front Panel)

PHASE f

€l

PHASE 2

PHASE 3

CIRCUIT 1 _ _ CIRCUIT Z

CIRCUIT 1 _ _ CIRCUIT 2

861-0 (Back Panel)

I..
:

POWER CONTROL 8.I1-E
INPUT 240 50/60 HZ

3PH~ASE 5 WIR~;:A/PHASE~
0
0

REMOTE ,
ON

.... 0

LOCAL
ON

MAXIMUM CURRENT AT 240 VOLTS
12 AMPS/OUTLET-III AMPS/PHASE

861-E (Front Panel)

PHA!iE f - . . , _ - - - PHASE 2 - - - _ _ _ . . , . - - - - PHASE 3 - - -....

Ci)Ci)CD~Q
~G:)G)G:)G)
CIRCUIT 2

CIRCUIT 1 _ _ CIRCUIT 2

CIRCUIT t - - CIRCUIT 2

CP-1730

861-E (Back Panel)
Figure 3-2 Type 861-0,-E Power Controller Panels

3-3

CIRCUIT
TWO

SWITCHEO
CI RCUIT
CIRCUIT
TWO
ONE

CIRCUIT
ONE

POWER CONTROL 861 F
INPUT 120V 50-60 HZ
2 POLE 3 WIRE 12A

REMOTE
LOCAL
ON
OFF
ON

CP-I731

Figure 3-3

Type 861-F Power Controller Panel

3.1.5 Power Outlets
Two groups of power outlets are provided on the
panel. The group containing eight (861-A,-B,-C,-F)
or ten (861-D,-E) receptacles is the switched group.
Under normal conditions, power is available at
these outlets when the LOCAL/OFF/REMOTE
switch is in the LOCAL position, or when in the
REMOTE position and a connection exists between
pins I and 3 of the Remote Switching Control Bus
connector. Power is removed from these outlets by
any of the following:
a.

LOCAL/OFF/REMOTE switch in the
REMOTE or LOCAL position and a
connection exists between the lines associated with pins 3 and 2 of the Remote
Switching Control Bus connectors (Emergency Shutdown signal asserted).

Overtemperature switch closed.

The group containing four power outlets is not controlled by the Remote Switching Control Bus.
Power is available at these outlets when the main
circuit breaker is closed and the power controller is
connected to the live mains. (861-D: branch circuit breaker also closed.)

Main circuit breaker in OFF position,
(or branch circuit breakers OFF if 861D.)

LOCAL/OFF/REMOTE switch In the
OFF position.

3.1.6 Overtemperature Switch
A thermally-activated switch is provided to disable
the controlled outlets in the event of an overtemperature condition at the power controller. The
switch opens at 160 0 F and resets automatically
when the ambient temperature at the power controller drops below 120 0 F.

LOCAL/OFF/REMOTE switch in the
REMOTE position and no connection
exists between the lines associated with
pins I and 3 of the Remote Switching
Control Bus Connectors.

3-4

861-A, B, C, D, E, F POWER CONTROLLER

Reader's Comments

USER'S MANUAL
EK-861 AB-OP-OOI

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