Epilson STSTM

Optional Steps

Should you require AC power on site prior to the arrival of the MGE Field Engineer, the following procedure will provide the AC power in the bypass mode. Should you have any questions about this procedure, do not hesitate to contact MGE Customer Support.

A.Ensure that all switches, CB1-5 in the STS are open (off).

B.Apply input power to the source S1 input of the STS by closing the upstream circuit breaker for source S1. The STS controls will power up and issues alarm(s). Silence the alarm buzzer by pressing the “Alarm Silence” pushbutton on the front display panel.

C.Lock CB5 (S2 bypass switch) and remove the lock key (for 4-interlock system, also lock CB2 and remove key). Using key(s), unlock and close CB4 (S1 bypass switch).

D.At this point, power will be available for site usage until the STS is properly commissioned.

E.Upon arrival of the MGE Field Service Engineer, the main power must be disconnected so that a safe and proper commissioning of the unit may be accomplished.

WARNING Do not, under any circumstance, close CB1, CB2, CB3A and

CB3B (if installed) until the unit has been commissioned by an

MGE Field Engineer.

Figure QS-5a 200A STS

 

Figure QS-5b 400/600A STS

 

STS MONITOR

 

 

 

 

 

STS MONITOR

 

 

 

CB1

 

 

 

CB4

 

CB1

CB4 CB3A

 

 

CB2

CB5 CB3B

 

KEY INTERLOCKS

 

(2 - STANDARD

 

 

CB2

 

 

4 - OPTIONAL)

 

 

 

KEY INTERLOCKS

 

CB5

 

(2 - STANDARD

 

 

 

4 - OPTIONAL)

 

 

 

 

 

CB3A

 

 

 

CB3B

 

QS —6

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