MGE UPS Systems EPS 7000 user manual Normal Shutdown, With Maintenance Bypass

Page 38

EPS 7000 Single Module

2.11.1 Emergency Shutdown Using EPO

CAUTION:

Pressing the EPO disconnects the attached load. The

 

emergency power off (EPO) is to be used during emergency

 

situations only, where a hazard to personnel or equipment

 

exists, such as during a fire. DO NOT USE THE EPO TO

 

TURN THE UPS OFF; follow the procedures listed in

 

this section for turning the inverter on and off.

 

 

During an emergency situation, such as a fire in the computer or electrical room, the UPS and all downstream devices can be instantly shut down by pressing the “emergency power off” (EPO) pushbutton on the front panel of the UPS cabinet, or by pressing the “remote emergency power off” (REPO) optional pushbutton located within the room.

The EPO or REPO pushbuttons should not be used for normal shutdown of the equipment; when activated, ground paths may be broken (depending on installation) and sensitive loads attached to the UPS may lose safety ground connection.

2.11.2Normal Shutdown

To shut down the UPS, press the “inverter off” pushbutton on the module front panel for 3 seconds. To restart, press the “inverter on” pushbutton. Note that the transfer will occur only if the inverter is synchronized to the bypass; otherwise, a forced transfer is needed, see section 2.12 Forced Transfers.

To isolate the UPS for maintenance, or to transfer the load to the bypass AC input source (if present), follow the procedure that applies to your configuration.

2.11.3With Maintenance Bypass

This procedure assumes that the UPS is operating normally, with the attached load supplied via the UPS inverter:

1.Stop the inverter by pressing the “inverter off” pushbutton on the UPS front panel for 3 seconds. The audible alarm will sound; silence the alarm by pressing the audible alarm reset pushbutton on the hidden panel. See section 1.5 Single Module Indicators and Controls.

If the transfer conditions are not satisfied (bypass out of tolerance or another reason), a forced transfer will be required., in this case refer to section 2.12 Forced Transfers for procedures.

2.Depress transfer initiate switch. Unlock and remove the key from key interlock. Unlock and close the mainte- nance bypass circuit breaker Q3BP, see Figure 1-3.

3.Open the UPS isolation circuit breaker Q5N and lock open. The UPS is now isolated from the load which is supplied by the bypass AC input source.

4.Open the circuit breaker Q4S.

5.Open the battery disconnect circuit breaker(s) QF1.

6.Open the input isolation circuit breaker Q1.

7.Remove the key from Q5N.

8.Insert the key into key interlock and turn to lock. The UPS system is ready for maintenance.

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Operation

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Contents EPS Opening enclosures expose hazardous voltages. Always refer Service to qualified personnel onlyWith installation manual, may cause harmful interference to Louverture des cabinets expose des tensions dangereusesFor service call MGE UPS SYSTEMS, Inc Scenic Avenue Costa Mesa, CA 92626 714Revision History WarrantyService and Factory Repair Call Proprietary Rights StatementService personnel against possible equipment damage How To Use This ManualService personnel against safety hazards and possible Equipment featureUPS Unit Serial Number MBP Cabinet Serial Number N t e n t EPS 7000 Single Module Operation Figures This page left blank intentionally Reference Manuals Section Descriptions MaintenanceScope IntroductionGeneral Description Specifications, Circuit Breakers and Powerflow Diagrams QF1Circuit Breaker Locations on the Maintenance Bypass Cabinet Power Flow Diagrams Normal Operation On-Battery OperationSingle Module Indicators and Controls Front Panel Alphanumeric Display Hidden Panel Cover PlateAudible alarm Front PanelTwo-line Alphanumeric Display Settings Display PushbuttonAlphanumeric Display and Controls Alphanumeric Display Pushbuttons ØOn/off Hidden Panel IndicatorsNumbered Lights LED Alphanumeric Indicators Reserved for future useAudible alarm reset Test connectorClear fault log Hidden Panel Lower PushbuttonsCertain the load can tolerate this interruption see section Using the forced transfer functions will cause the load toExperience an interruption for a minimum of 0.8 seconds. Be Forced TransfersThis page left blank intentionally Status Screen Display General status screenSelect English U.S. as the display language to match Settings Selection ScreenAlarms Displays as presented in this manualSensor Measurements Bypass V, HzVoltage Measurements RMSCurrent Measurements Load Crest FPower Frequency Measurements Load P1 P2 P3 KVABattery Measurements Battery Measurements DisplaysLCD Messages General AlarmsSecondary Alarms Battery Cabinet Overtemp Charger OFF Inverter Shutdown Thermal Overload a Preparations Before Start-up Checks Before Start-up Start-upProgrammed for automatic restart, the inverter will Automatically start after the battery disconnect circuitBecause it is standard for the UPS module to be Breaker QF1 has been closedWith Maintenance Bypass Normal ShutdownOpening Q4S with the inverter stopped in a UPS without Without Maintenance BypassMaintenance bypass will disconnect the attached load Forced Transfer from Inverter to Bypass AC Input Uninterrupted Transfer ConditionsForced Transfer from Bypass AC Input Source to Inverter Leistungsfaehigkeit. Unbeabsichtigtes Schweissen und Gleichstrom zum Wechselrichter kommt gewoehnlich von derBatteriebank mit einer sehr hohen Kurzschluss Schwere Verbrennungen koennen die Folgevon fehlerhafterLevel Description Preventive MaintenanceReplacement Parts Symbols Definition / Meaning O s s a r yIEC LCD Spdt Volts This page left blank intentionally Reorder form Scenic Avenue Costa Mesa, CA Page Page Scenic Avenue, Costa Mesa, California 92626 714 557
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