Appendices

A1 Electrical Characteristics

Selection of Protection Devices

UPS with common normal and bypass AC inputs

 

 

 

Q3BP

 

 

 

Bypass

 

 

 

Q4S

Static Switch

 

 

Upstream

 

PFC

 

Downstream

circuit breaker

 

 

circuit breaker

(not supplied) Main

 

Boost

 

(not supplied)

Q1

Rectifier Inverter

Q5N Output

Input

Load

Normal AC

 

Bypass AC

Battery CB

 

UPS unit with separate normal and bypass AC inputs

 

 

 

 

 

 

 

Q3BP

 

 

Upstream

 

 

 

 

 

 

circuit breaker

Bypass

 

Bypass

 

 

 

(not supplied)

Q4S

Static Switch

 

 

 

Input

 

 

 

 

 

 

 

 

 

Upstream

 

 

 

 

 

Downstream

 

 

PFC

 

 

circuit breaker

circuit breaker

 

 

 

 

Main

 

Boost

 

 

(not supplied)

(not supplied)

Q1

Q5N

 

Input

Rectifier Inverter

Output

Load

 

 

 

 

 

Battery CB

NOTE: Interrupted Transfer to Bypass Source:

If the bypass source is beyond the conditions stated below, the UPS will make an interrupted transfer (not more than 100 msec. in duration).

1.Bypass voltage greater than +15%, -15% from the UPS rated output voltage.

2.Bypass frequency greater than ±2 Hz from the UPS rated output frequency.

86-174010-00 B00

Appendices

A — 1

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Image 57
APC 40 130KVA user manual Appendices, A1 Electrical Characteristics, Selection of Protection Devices