Trip Relay Contacts - GE 269Plus Instruction Manual

Motor management relay

Table of Contents

2 INSTALLATION

The main control relay or shunt trip coil of the motor starter or circuit breaker should be connected to the Trip

relay contacts of the 269Plus. These contacts are available as normally open (NO), normally closed (NC), and

can switch up to 10 A at either 250 V AC or 30 V DC with a resistive load. Silver cadmium oxide contacts are

used because of their ability to handle high inrush currents on inductive loads. Contact GE Power Manage-

ment if these contacts are to be used for carrying low currents since they are not recommended for

use below 0.1 A. Connection to the motor contactor or breaker is shown in Figures 2–7: RELAY WIRING DIA-

GRAM (AC CONTROL POWER), 2–8: OUTPUT RELAY CONTACT STATES, and 2–10: RELAY WIRING DIA-

GRAM (DC CONTROL POWER) on pages 2–8 to 2–11.

The Trip output relay will remain latched after a trip. This means that once this relay has been activated it will

remain in the active state until the 269Plus is manually reset. The Trip relay contacts may be reset by pressing

the RESET key (see Section 3.1: FRONT PANEL) if motor conditions allow, or by using the Emergency Restart

feature (see Section 2.12: EMERGENCY RESTART TERMINALS on page 2–20), or the External Reset termi-

nals, or by remote communications via the RS485 port.

The Trip relay may be programmed to be fail-safe or non-fail-safe. When in the fail-safe mode, relay activation

or a loss of power condition will cause the relay contacts to go to their power down state. Thus, in order to

cause a trip on loss of power to the 269Plus, output relays should be programmed as fail-safe.

The Trip relay cannot be reset if a lock-out is in effect. Lock-out time will be adhered to regardless of whether

control power is present or not. A maximum of one hour lockout time is observed if control power is not

present.

The Trip relay can be programmed to activate on any combination of the following trip conditions: overload,

stator RTD overtemperature, rapid trip, unbalance, ground fault, short circuit, RTD overtemperature, accelera-

tion time, number of starts per hour, single phase, speed switch closure on start, differential relay closure,

spare input closure, and start inhibit (see Section 3.4: ACTUAL VALUES MODE on page 3–7 for factory preset

configurations).

Connections to the Trip relay contacts are made via a terminal block which uses #6 screws.

The rear of the 269Plus relay shows output relay contacts in their power down state. Figures 2–7:

RELAY WIRING DIAGRAM (AC CONTROL POWER), 2–9: RELAY WIRING DIAGRAM (TWO

PHASE CTs), and 2–10: RELAY WIRING DIAGRAM (DC CONTROL POWER) show output relay

NOTE

contacts with power applied, no trips or alarms, and Factory Configurations in effect (i.e. TRIP: fail-

safe, ALARM: non-fail-safe, AUX.1: non-fail-safe, AUX.2: fail-safe). See Figure 2–8: OUTPUT

RELAY CONTACT STATES on page 2–9 for a list of all possible contact states.

In locations where system voltage disturbances cause voltage levels to dip below the range

specified in Section 1.5 TECHNICAL SPECIFICATIONS, any relay contact programmed failsafe

may change state. Therefore, in any application where the "process" is more critical than the

WARNING

motor, it is recommended that the trip relay contacts be programmed non-failsafe. In this

case, it is also recommended that the AUX2 contacts be monitored for relay failure. If, how-

ever, the motor is more critical than the "process", then the trip contacts should be pro-

grammed failsafe.

GE Power Management

Courtesy of NationalSwitchgear.com

269Plus Motor Management Relay