Emerson Nfinity 208 - Manual (Page 17)

Installation
13
2.3.2 Connecting to External Panel Boards
The following instructions are also shipped attached to the rear of the unit.
INPUT CABLING AND PROTECTION
Table Below Applies to 12-20kVA Scalable Systems:
Stand-alone UPS or
UPS equipped with a Maintenance Bypass Cabinet (Without Transformer)
UPS With Maintenance Bypass Cabinet (With Transformer)
Single Input Feed: All UPS ratings must use 125A input circuit breaker protection.
Dual Input Feed: See table below.
Bypass Voltage Jumper Position (TB2)
Max. System
Load Rating
Input Voltage – 208VAC Input Voltage – 240VAC
Max. Current
in UPS mode
Recommended
Input Protection
Circuit Breaker
Max. Current
in UPS mode
Recommended
Input Protection
Circuit Breaker
12kVA 53 amps 75 amps 46 amps 75 amps
16kVA 70 amps 100 amps 62 amps 100 amps
20kVA 102 amps 125 amps* 88 amps 125 amps*
Terminal
Block
Details
Maximum: 35mm 2 (2AWG) * Must use 90° copper wire
Minimum: 16mm 2 (6AWG)
Torque Rating: 2.5-3.0Nm (22-26in/lbs)
Max. System
Load Rating
UPS Feed Bypass Feed
Input Voltage – 208VAC Input Voltage – 240VAC 208V or 240V
Max. Current
in UPS mode
Recommended
Input Protection
Circuit Breaker
Max. Current
in UPS mode
Recommended Input
Protection Circuit Breaker
Recommended
Input Protection
Circuit Breaker
12kVA 53 amps 75 amps 46 amps 75 amps 125 amps*
16kVA 70 amps 100 amps 62 amps 100 amps 125 amps*
20kVA 102 amps 125 amps* 88 amps 125 amps* 125 amps*
Terminal
Block
Details
Maximum: 35mm 2 (2AWG) * Must use 90° copper wire
Minimum: 16mm 2 (6AWG)
Torque Rating: 2.5-3.0Nm (22-26in/lbs)
Bypass Voltage Selection
208 VAC
(Factory Default)
240 VAC
(Field Change)
Jumper/link
on upper two
screws
Jumper/link
on lower two
screws