GE Industrial Solutions Power Break II Undervoltage Release 480 - 600 Vac User Manual

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GEH–6520A

Power Break® II Circuit Breaker
Accessories

Undervoltage Release
480 & 600 Vac

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 480 and 600 Vac
applications are listed in Table 1. Voltage and current ratings
in Table 1 are given at the input of the transformer. The
voltage and current ratings at the input of the UVR accessory
are equal to that of the SPUV120AC accessory. Input voltage is
120 Vac, peak inrush current is 3 A, and the nominal RMS
current is 80 mA.

Operation

Apply control voltage to the primary of the s upplied step-down
transformer. The secondary of the transformer is connected to
terminals 29 and 3 0 of the terminal strip on the right side of
the breaker.

Figure 1. Undervoltage Release.

Catalog

Number

SPUV480AC 480 Vac 750 20

SPUV600AC 600 Vac 600 16

➀

Rated for 50/60 Hz. Rating is 120 Vac without step-down
transformer.

➁

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

➀

Current, mA

Peak Inrush

Nominal RMS

➁

Current, mA

Installation

WARNING: Before installing any accessories, turn the breaker

OFF, disconnect it from all voltage sources, and discharge the
charging springs.

WARNING: 480 Vac and 600 Vac Undervoltage Release
accessories must be used with the supplied step-down
transformer.

AVERTISSEMENT: Les modules de déclenchement à manque
de tension 480 Vac et 600 Vac doivent être utilisés avec le
transformateur abaisseur de tension qui est fourni.

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.

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 access ory
compartment through the front of the circuit breaker in the
position shown in Figure 2.

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 ac cessory compartment and
Trip Unit.

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

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

Undervoltage Release slot indicated.

3. Insert the UVR accessory into the proper slot, as
illustrated in Figure 3. The UVR accessory is keyed for
the correct slot in the accessory compartment. I f the
accessory cannot be fully seated in the compartmen t, check
that the compartment position is correct.

Catalog Number/

Control Voltage

9T58K0042 / 480 V H1, H4➀ X1, X2

9T58K0062 / 600 V H1, H4 X1, X3

➀ A jumper must be placed from H2 to H3.

Primary

Connections

Secondary

Connections

Table 2. Primary and secondary connections for step-down

transformers.

8. Connect the secondary side of the transformer, marked as
the X-numbered terminals, to terminals 29 and 30 of the
terminal block on the right side of the breaker. Table 2
lists the correct transformer secondary taps.

WARNING: 480 Vac and 600 Vac Undervoltage Release
accessories must be used with the supplied step-down
transformer.

AVERTISSEMENT: Les modules de déclenchement à manque
de tension 480 Vac et 600 Vac doivent être utilisés avec le
transformateur abaisseur de tension qui est fourni.

9. Test the UVR to ensure proper operation, according to the
procedures below.

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

11. 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.

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 UV R 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. Mount the supplied step-down transformer near the circuit
breaker.

7. Connect the control wiring for the UVR to the primary
side of the transformer, marked as the H-numbered
terminals. Table 2 lists the correct transformer primary
taps.

Accessory Configuration

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
Unit. If the breaker is equipped with a Power+ Trip Unit, the
factory default settings, listed in Table 3, 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 brea ker, 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 3 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).