196

Diversified Electronics

800.727.5646

atcdiversified.com

Diversified Electronics

800.727.5646

atcdiversified.com

3-Phase Current Unbalance &

Over Current Monitor

WIRING

DIMENSIONS (INCHES)

OPERATION

SPECIFICATIONS

OPERATING VOLTAGE

3-Phase, 50/60 Hz, 600 V max

CONTROL VOLTAGE

120 VAC, 50/60 Hz

OVER CURRENT

See Table for Adjustable Ranges

UNBALANCE RANGE

5% to 25%, Adjustable

INRUSH DELAY

0.1 To 10 SEC, Adjustable; Initiated

When Current of Any Phase rises 20%

Above the Max. Operating Current

OUTPUT

SPDT, 10 amp @ 240 VAC Resistive

HYSTERESIS

2% of Unbalance Setting

RESPONSE TIME

Operate

1 Second, Max.

Release

100 mSEC

INDICATOR

LED Glow When All Conditions Are Normal

RESET

Automatic or Manual

TEMPERATURE RATING

Operate

32° to 131°F (0° to +55°C)

Storage

-49° to 185°F (-45° to +85°C)

WEIGHT

13 oz.

The CLB Series is designed to protect three phase equipment against

CURRENT UNBALANCE and OVER CURRENT conditions.

The control voltage is continuously applied to supply the sensing

circuitry and the internal relay. When the current of any phase approxi-

mately 20% above the maximum operating current, the inrush delay

begins. This delay disables the over current sensors while high inrush

currents are present. Any time the currents are outside the preset limits

after completion of the inrush delay, the internal relay will de-energize

(Drop-out). An External CT may be used to extend the range of the

current monitor.

A 2% differential (hysteresis) between Pick-up and Drop-out is incorpo-

rated to prevent chattering when operated in the automatic reset mode

and the current is at the trip point.

The reset mode is selected as follows:

AUTOMATIC: Place a jumper between pins ten (10) and eleven (11).

MANUAL: Place a normally open switch between pins ten (10) and

eleven (11). When there is a loss and reapplication of the control

voltage, the external switch must be closed before the circuit will again

become operative.

MODEL

CONTROL

OVER

NUMBER

RANGE

CURRENT RANGE

CLB-120-ALE-5

120 VAC

1.0 to 5.0 amps,

Adjustable

CLB-120-ALE-10

120 VAC

2.0 to 10 amps,

Adjustable