Energy Tech Laboratories EDP70 manual MI00/10056 rev.1--05/2001

Page 10

Reserve Supply

AC Supply

S3	Maintenance By-pass

S2
S1	S4
Battery	24/36kVA Ratings
Contactor	24/36kVA Ratings

S3	Maintenance By-pass

Reserve Supply	S2	S5
	S1	S4
AC Supply
	Battery	50/80kVA Ratings
	Contactor	50/80kVA Ratings

480Y/277V

208Y/120V

Figure 5 – Re-establishing the Utility Supply

When the utility supply returns within acceptable limits, the UPS returns automatically to normal operation mode as previously described. The rectifier now starts to recharge the battery. However, until recharge has been completed, any further mains failure will result in reduced standby times.

S3

Reserve Supply

S2

S1

AC Supply

S3

Reserve Supply

S2

S1

AC Supply

Maintenance By-pass

S4

Battery

Contactor 24/36kVA Ratings

	Maintenance By-pass
	S5
	480Y/277V
	S4
	208Y/120V
Battery	50/80kVA Ratings
Contactor	50/80kVA Ratings

Figure 6 – Transferring the Load onto the Reserve Supply

Transfer onto the reserve line is caused by two conditions:

a)inverter stop

b)overload

In both instances the load is transferred onto the reserve without interruption. If the overload is temporary, the system will re-transfer from reserve to inverter as soon as the it ceases. This allows for the initial start-up of loads with high or excessive switch-on currents.

page 10 --MI00/10056 rev.1--05/2001

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Contents EDP70 Plus Important Safety Instructions Read Before Installing ALL CASES, Seek Medical Attention Immediately Contents Figures Summary of the manual Block diagramIntroduction Summary of the equipment24kVA Standard Configuration Functions 480VOperational modes 24/36kVA Ratings10 --MI00/10056 rev.1--05/2001 General safety SafetySymbols Battery precautions Electrical precautionsBattery safety equipment Mechanical characteristics InstallationStorage ALL Measurements are Millimeters and Inches NR4 16 --MI00/10056 rev.1--05/2001 Battery Cabinet Drawing for 24/36kVA Ratings 18 --MI00/10056 rev.1--05/2001 Battery Cabinet Drawing for 50/80kVA Ratings 20 --MI00/10056 rev.1--05/2001 Installation Recommended wire sizes Supply Output Reserve Supply UPS Type Ventilation = 2770 - - - ∙ e 0.125 h Tk / T0 Tr TkConnection OutputUninterruptible Power System No Unauthorized Operation MI00/10056 rev.1--05/2001-- Table of T& B’s cat.no.s for terminals and crimp tools Electrical connectionsBattery Compartment 24 12/18/24kVAOutput, Reserve, Input Reserve Ground Primary Input Output External Batteries 36 24/30/36kVA Observe Polarities and Orientations RS232 Female EDP70 Plus 50/80kVA 36 --MI00/10056 rev.1--05/2001 QS1 QS2 QS3 QS4 QS5 Battery charge inhibited Signal connectionsEmergency Power Off Thermostick connector 50/80kVA onlyControls Display indicatorsUser Controls Control Panel LCDStart UP Installing the EPO Maintenance BypassSHUT-DOWN MI00/10056 rev.1--05/2001-- Mimic Visual and Audible AlarmsSilencing Audible Alarm Liquid Crystal DisplayDisplay Page Headings System NormalBattery Test Weekly Power History Down to Access Load Time on Reserve xxg xxh xxm xxs Inverter Load Abnormal operating mode messages System AlarmStop DUE to Overload RECTIFIER/BATTERY Alarms Message Condition Inverter Alarms Message Condition LOAD/RESERVE Alarms Message Condition Power History Power History MatrixBattery Autonomy Test Battery TestResetting data loss manually MI00/10056 rev.1--05/2001-- Computer Interface 11.1 AS400Remote Alarms 11.2 RS23213.1 EDP70 PLUS/24/18/12 Battery Installation/Start-up Batteries= EDP70 PLUS/24/18/12 Internal Battery Shelves 13.2 EDP70 PLUS/24/18/12 Optional Battery Cubicle13.3 EDP70 Plus above 20kVA Battery Installation/Start-up Maintenance and Spare Parts13.4 EDP70 Plus above 20kVA Battery Cubicle EDP70 Plus System LOG