APC 125KVA PDU w/ 480 PRI 208/120 SEC K 13 XMER Installation Manual download pdf (Page 41)

SPDU Installation Manual 37

Appendix C: Monitoring

Basic monitoring

• The Basic monitoring package consists of an EPO Push button, a Horn, an Alarm Light, an

Alarm Silence Push button, a Summary Alarm Relay, and Power Transformer High

Temperature Thermostats (located in each coil).

• The Power Transformer’s thermostat is set at 180°C. Should the Transformer reach or exceed

this temperature, the Horn and Alarm Light become activated. The Summary Alarm Relay is

also activated.

• Depressing the Silence Push button silences the Horn. However, the Alarm Light remains on for

as long as the alarm condition continues. Note that the Horn cannot be reactivated until the

existing alarm(s) have been cleared.

• The EPO (Emergency Power Off) Push button is located behind a protective cover. To shut

down the SPDU, lift the cover and push this button. This energizes the main input circuit

breaker’s shunt trip, causing the breaker to trip and the SPDU to de-energize.

• If connected, the External Alarm Circuit can also activate the Horn and the Alarm Light.

• The Power Transformer contains an additional thermostat set at 200°C. Should the Transformer

reach or exceed this temperature, the shunt trip activates and subsequently de-energizes the

main input circuit breaker.

• If any of the Transformer’s temperature alarms are activated, the entire system should be

examined to first determine and then resolve the problem.

• Terminals are provided to accommodate the Remote EPO Circuit, the External Alarm Circuit

and the HVAC Shutdown Circuit. Refer to the schematic for details.

Advanced or premium monitoring

Advanced tools are available in several versions, and can be employed for further monitoring of the

SPDU. If the unit is shipped with Advanced or Premium monitoring functionality, the instruction

manual for that level of metering will be included in the documentation package.

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APC 125KVA PDU w/ 480 PRI 208/120 SEC K 13 XMER Installation Manual Page 41