MGE UPS Systems EPS 7000 user manual Without Maintenance Bypass

Page 39

Users Manual

For complete protection, the upstream circuit breaker(s) supplying the UPS should be opened, locked, and tagged while the UPS is being serviced. The UPS is now isolated for maintenance.

NOTE: This will dump any load being serviced even through the Bypass.

To restart the UPS after maintenance:

1.Close all the upstream circuit breakers supplying the UPS. Close the input isolation circuit breaker Q1.

2.Close the circuit breaker Q4S. The UPS fans will start. Verify that the UPS is on bypass.

3.Depress transfer initiate switch. Unlock and remove the key from key interlock.

4.Insert the key into Q5N and unlock. Close the UPS isolation circuit breaker Q5N.

5.Open the maintenance bypass circuit breaker Q3BP and lock open. Remove the key.

6.Insert the key into the key interlock and turn to lock.

7.Wait for the green LED “B” on the hidden panel to turn on (indicating that the rectifier/battery charger has started), then close the battery disconnect circuit breaker QF1. If there is more than one battery cabinet in your configuration, close all the battery disconnect circuit breakers.

8.Automatic restart of the UPS is the normal configuration; the UPS inverter will start automatically and resume normal operation. If your EPS 7000 has been programmed NOT to automatically restart, start the inverter by pressing the “inverter on” pushbutton on the UPS front panel. The inverter will start and the UPS will resume normal operation. If the transfer conditions are not satisfied (bypass out of tolerance or other reason), a forced transfer will be required. Refer to section 2.12, Forced Transfers.

2.11.4Without 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 Figure 1-8). If the transfer conditions are not satisfied (bypass out of tolerance or other reason), a forced transfer is required; refer to Section 2.12, Forced Transfers.

2.Open the circuit breaker Q4S.

CAUTION:

Opening Q4S with the inverter stopped in a UPS without

 

maintenance bypass will disconnect the attached load.

 

 

 

 

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

4.Open the input isolation circuit breaker Q1.

For complete protection, the upstream circuit breaker(s) supplying the UPS should be opened, locked, and tagged while the UPS is being serviced. The UPS is now isolated for maintenance.

To restart the UPS after maintenance:

1.Close all the upstream circuit breakers supplying the UPS. Close the input isolation circuit breaker Q1.

2.Close the circuit breaker Q4S. The UPS fans will start and the attached load will be supplied via the bypass source.

Operation

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Contents EPS Louverture des cabinets expose des tensions dangereuses Service to qualified personnel onlyWith installation manual, may cause harmful interference to Opening enclosures expose hazardous voltages. Always referMGE UPS SYSTEMS, Inc Scenic Avenue Costa Mesa, CA 92626 714 For service callProprietary Rights Statement WarrantyService and Factory Repair Call Revision HistoryEquipment feature How To Use This ManualService personnel against safety hazards and possible Service personnel against possible equipment damageUPS Unit Serial Number MBP Cabinet Serial Number N t e n t EPS 7000 Single Module Operation Figures This page left blank intentionally Introduction MaintenanceScope Reference Manuals Section DescriptionsGeneral Description QF1 Specifications, Circuit Breakers and Powerflow DiagramsCircuit Breaker Locations on the Maintenance Bypass Cabinet On-Battery Operation Power Flow Diagrams Normal OperationFront Panel Alphanumeric Display Hidden Panel Cover Plate Single Module Indicators and ControlsFront Panel Audible alarmSettings Display Pushbutton Alphanumeric Display and ControlsTwo-line Alphanumeric Display Alphanumeric Display Pushbuttons Hidden Panel Indicators Numbered LightsØOn/off Reserved for future use LED Alphanumeric IndicatorsHidden Panel Lower Pushbuttons Test connectorClear fault log Audible alarm resetForced Transfers Using the forced transfer functions will cause the load toExperience an interruption for a minimum of 0.8 seconds. Be Certain the load can tolerate this interruption see sectionThis page left blank intentionally General status screen Status Screen DisplayDisplays as presented in this manual Settings Selection ScreenAlarms Select English U.S. as the display language to matchBypass V, Hz Sensor MeasurementsRMS Voltage MeasurementsLoad Crest F Current MeasurementsLoad P1 P2 P3 KVA Power Frequency MeasurementsBattery Measurements Displays Battery MeasurementsGeneral Alarms Secondary AlarmsLCD Messages Battery Cabinet Overtemp Charger OFF Inverter Shutdown Thermal Overload a Start-up Preparations Before Start-up Checks Before Start-upBreaker QF1 has been closed Automatically start after the battery disconnect circuitBecause it is standard for the UPS module to be Programmed for automatic restart, the inverter willNormal Shutdown With Maintenance BypassWithout Maintenance Bypass Maintenance bypass will disconnect the attached loadOpening Q4S with the inverter stopped in a UPS without Uninterrupted Transfer Conditions Forced Transfer from Bypass AC Input Source to InverterForced Transfer from Inverter to Bypass AC Input Schwere Verbrennungen koennen die Folgevon fehlerhafter Gleichstrom zum Wechselrichter kommt gewoehnlich von derBatteriebank mit einer sehr hohen Kurzschluss Leistungsfaehigkeit. Unbeabsichtigtes Schweissen undPreventive Maintenance Replacement PartsLevel Description O s s a r y Symbols Definition / MeaningIEC 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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