MGE UPS Systems 4000 RT user manual Required protective devices and cable cross-sections

2. Installation

2.6 Required protective devices and cable cross-sections

Recommended upstream protection

UPS power rating	Upstream circuit breaker
4000 RT	D curve - 32A
5000 RT	D curve - 32A

2 poles circuit breaker

The indicated protection ensures discrimination for each output circuit downstream of the UPS.

If these recommendations are not followed, protection discrimination is not achieved and may result in a potential power interruption to the connected devices.

L

N To UPS Normal AC source

G N L

Recommended downstream protection

UPS power rating	Downstream circuit breaker
4000 RT	Z curve - 10A
	C curve - 4A
5000 RT	Z curve - 10A
	C curve - 6A

The indicated protection ensures discrimination for each output circuit downstream of the UPS.

If these recommendations are not followed, protection discrimination is not achieved and may result in a potential power interruption to the connected devices.

Required cable cross-sections

◗Terminal-block cable capacity: 6 mm2, solid or stranded wire (maximum 8 mm2 or AWG 8).

◗Capacity for earthing conductor: 6 mm2, solid or stranded wire (maximum 8 mm2 or AWG 8).

34008030EN/AA - Page 18