GE Industrial Solutions Power Break II Undervoltage Release User Manual

❡

g

GEH–6285C

Power Break® II Circuit Breaker
Accessories

Undervoltage Release

Introduction

The Undervoltage Release (UVR) accessory, shown in Figure
1, can be installed in 800–4000 ampere frame Power Break®
II circuit breakers. This accessory trips the circuit breaker when
the input control voltage drops to 35–60% of its rated value
and prevents an open breaker from closing until the input
control voltage is greater than 8 0% of the rated value.

In addition to providing a trip signal to the breaker, the UVR
accessory can be set up to interact with other Power Break II
accessories, when used with a MicroVersaTrip Plus™ or
MicroVersaTrip PM™ Trip Unit. DIP switches on the rear of
the breaker Trip Unit can configure the UVR accessory to
activate a Bell Alarm–Alarm Only accessory or a Bell Alarm
with Lockout accessory when a UVR trip occurs. The Accessory
Configuration section below describes how this can be done. If
the breaker is equipped with a Power+™ Trip Unit, it is
configured so that only protection trips will activate a Bell
Alarm–Alarm Only or Bell Alarm with Lockout.

The catalog numbers for the UVR for various voltage
applications are listed in Table 1.

Catalog

Number

SPUV012DC 12 Vdc 19 300

SPUV024DC 24 Vdc 15 140

SPUV048DC 48 Vdc 7.5 70

SPUV125DC 125 Vdc 3 30

SPUV250DC 250 Vdc 1.5 15

SPUV024AC 24 Vac 15 370

SPUV048AC 48 Vac 7.5 210

SPUV120AC 120 Vac 3 80

SPUV208AC 208 Vac 1.9 60

SPUV240AC 240 Vac 1.5 45

❿

24–240 Vac devices are rated for 50/60 Hz.

❡

Peak inrush current is present for 2–6 ms after activation. This
number is provided so that fuses and supplies can be chosen
appropriately.

Table 1. Catalog numbers and voltages for the Undervoltage Release.

Voltage

Rating

❿

Peak Inrush

Current, A

Nominal RMS

Current, mA

Installation

Figure 1. Undervoltage Release.

Operation

Apply control voltage to terminals 29 and 30 of the terminal
strip on the right side of the breaker. When the applied control
voltage is above 80% of the UVR’s rated value, the breaker can
be closed. When the voltage drops to 35–60% of the rated
value, the UVR will trip the breaker.

WARNING: Before installing any accessories, turn the breaker
OFF, disconnect it from all voltage sources, and discharge the
charging springs.

AVERTISSEMENT: Avant d’installer toute accessoire, mettre
le disjoncteur en position OFF, le déconnecter de toute tension
d’alimentation, et décharger les ressorts d’armement.

The Undervoltage Release is installed in the accessory
compartment through the front of the circuit breaker in the
position shown in Figure 2.

Figure 2. Accessory compartment on front of circuit breaker, with

Undervoltage Release slot indicated.

Use the following procedure to install the UVR accessory into
the UVR slot in the accessory compartment of the circuit
breaker:

1. Open the hinged door over the accessory compartment and
Trip Unit.

2. To remove an existing accessory module, loosen the
accessory locking screw and pull the module out with the
Rating Plug Removal Tool (catalog number TRTOOL).

3. Insert the UVR accessory into th e proper slot, as
illustrated in Figure 3. The UVR accessory is keyed for
the correct slot in the accessory compartment. If the
accessory cannot be fully seated in the compartment, check
that the compartment position is correct.

Unit. If the breaker is equipped with a Power+ Trip Unit, the
factory default settings, listed in Table 2, can not be changed.

The UVR accessory can be configured to activate the Bell
Alarm–Alarm Only or Bell Alarm with Lockout accessories if a
UVR trip occurs. The configuration can be changed by removing
the Trip Unit from the breaker, setting the DIP switches on the
rear of the Trip Unit, and reinstalling the Trip Unit. Figure 4
illustrates the Trip Unit read DIP switches and their functions.
Table 2 lists the switch functions and the factory settings for
each.

Figure 4. Accessory switch on the rear of the MicroVersaTrip Plus™ or

MicroVersaTrip PM™ Trip Unit, showing the factory settings (solid

part indicates that the switch is pushed in on that side).

Figure 3. Inserting the Undervoltage Release into the accessory

compartment.

4. Tighten the locking screw on the front of the accessory
until it is snug (torque of 9 in-lb.)

CAUTION: Overtightening the locking screw may damage or
distort the case of the accessory.

ATTENTION: Le serrage excessif de la vis de verrouillage
peut déformer le boîtier d’accessoire.

5. If the breaker is equipped with a MicroVersaTrip Plus or
MicroVersaTrip PM Trip Unit, the UVR accessory can be
configured to activate installed Bell Alarm–Alarm Only or
Bell Alarm with Lockout accessories when a UVR trip
occurs, with the procedure described in the Accessory
Configuration section.

6. Connect the control wiring for the UVR to terminals 29
and 3 0 a t the terminal block on the right side of the
breaker.

7. Te st the UVR to ensure proper operation, according to the
procedures below.

8. Reconnect power to the circuit breaker and any other
accessories.

9. Close and lock or seal the door over the accessory
compartment and Trip Unit to prevent unauthorized
changes to Trip Unit settings and to keep contaminants
out of empty accessory slots.

Accessory Configuration

Switch

1 Disabled

2 Disabled

3 Enabled

4 Disabled

5 Disabled

6 Enabled

Factory
Setting Function

Shunt trip activates Bell Alarm–Alarm

Only

UVR trip activates Bell Alarm–Alarm

Only

Protection trip activates Bell

Alarm–Alarm Only

Shunt trip activates Bell Alarm with

Lockout

UVR trip activates Bell Alarm with

Lockout

Protection trip activates Bell Alarm

with Lockout

Table 2. Accessory switch settings, including the factory defaults.

This section only applies if Bell Alarm–Alarm Only or Bell
Alarm with Lockout accessories are installed in the breaker,
along with a MicroVersaTrip Plus or MicroVersaTrip PM Trip