Upstream and Downstream Protection - Easy UPS 3S Pro 380/400/415 V

NOTE: For local directives which require 4-pole circuit breakers: If neutral conductor is expected to carry a high current, due to line-neutral non-linear load, the circuit breaker must be rated according to expected neutral current.

NOTE: For local directives which require 4-pole circuit breakers: Refer to the earthing diagrams for details about neutral connection.

The bypass/output disconnect devices are sized based on the nominal current +10%. This is to accommodate either low grid voltage or deviation in length between parallel UPSs.

Required Upstream Protection for 380/400/415 V (IEC) and Minimum Prospective Phase-To-Earth Short Circuit at the UPS Input/Bypass Terminals

DANGER
Hazard of electric shock, explosion, or arc flash The upstream overcurrent protective device (and its settings) must be sized to ensure a disconnecting time within 0.07 seconds in case of a short circuit between the input/bypass phase and the UPS. Failure to follow these instructions will result in death or serious injury.

Compliance is assured with the recommended circuit breaker (and its settings) from the table below.

Required 3-Pole Upstream Protection

NOTE: Ir must be set on the circuit breakers during start-up.

UPS rating	10 kVA
	Input			Bypass/Output
Voltage (V)	380	400	415	380	400	415
Circuit breaker type	NSX100B TM25D 3P3D, C10B3TM025			NSX100B TM25D 3P3D, C10B3TM025
In	25	25	25	25	25	25
Ir	0.8 x In	0.8 x In	0.8 x In	0.7 x In	0.7 x In	0.7 x In
Im	300	300	300	300	300	300

UPS rating	15 kVA
	Input			Bypass/Output
Voltage (V)	380	400	415	380	400	415
Circuit breaker type	NSX100B NSX TM32D 3P3D, C10B3TM032			NSX100B TM32D 3P3D, C10B3TM032
In	32	32	32	32	32	32
Ir	In	In	In	0.9 x In	0.8 x In	0.8 x In
Im	400	400	400	400	400	400

UPS rating	20 kVA
	Input			Bypass/Output
Voltage (V)	380	400	415	380	400	415
Circuit breaker type	NSX100B TM40D 3P3D, C10B3TM040			NSX100B TM40D 3P3D, C10B3TM040
In	40	40	40	40	40	40
Ir	In	In	In	0.9 x In	0.9 x In	0.8 x In
Im	500	500	500	500	500	500

UPS rating	30 kVA
	Input			Bypass/Output
Voltage (V)	380	400	415	380	400	415
Circuit breaker type	NSX100B TM63D 3P3D, C10B3TM063			NSX100B TM63D 3P3D, C10B3TM063
In	63	63	63	63	63	63
Ir	In	In	In	0.9 x In	0.8 x In	0.8 x In
Im	500	500	500	500	500	500

UPS rating	40 kVA
	Input			Bypass/Output
Voltage (V)	380	400	415	380	400	415
Circuit breaker type	NSX100B TM63D 3P3D, C10B3TM080			NSX100B TM63D 3P3D, C10B3TM080
In	80	80	80	80	80	80
Ir	In	In	In	0.9 x In	0.9 x In	0.8 x In
Im	640	640	640	640	640	640

Required 4-Pole Upstream Protection

NOTE: Ir must be set on the circuit breakers during start-up.

UPS rating	10 kVA
	Input			Bypass/Output
Voltage (V)	380	400	415	380	400	415
Circuit breaker type	NSX100B TM25D 4P3D, C10B6TM025			NSX100B TM25D 4P3D, C10B6TM025
In	25	25	25	25	25	25
Ir	0.8 x In	0.8 x In	0.8 x In	0.7 x In	0.7 x In	0.7 x In
Im	300	300	300	300	300	300

UPS rating	15 kVA
	Input			Bypass/Output
Voltage (V)	380	400	415	380	400	415
Circuit breaker type	NSX100B TM40D 4P3D, C10B6TM040			NSX100B TM40D 4P3D, C10B6TM040
In	40	40	40	40	40	40
Ir	0.8 x In	0.8 x In	0.8 x In	0.7 x In	0.7 x In	0.7 x In
Im	500	500	500	500	500	500

UPS rating	20 kVA
	Input			Bypass/Output
Voltage (V)	380	400	415	380	400	415
Circuit breaker type	NSX100B TM63D 4P3D, C10B6TM063			NSX100B TM63D 4P3D, C10B6TM063
In	63	63	63	63	63	63
Ir	0.7 x In	0.7 x In	0.7 x In	0.7 x In	0.7 x In	0.7 x In
Im	500	500	500	500	500	500

UPS rating	30 kVA
	Input			Bypass/Output
Voltage (V)	380	400	415	380	400	415
Circuit breaker type	NSX100B TM80D 4P3D, C10B6TM080			NSX100B TM80D 4P3D, C10B6TM080
In	80	80	80	80	80	80
Ir	0.8 x In	0.8 x In	0.8 x In	0.7 x In	0.7 x In	0.7 x In
Im	640	640	640	640	640	640

UPS rating	40 kVA
	Input			Bypass/Output
Voltage (V)	380	400	415	380	400	415
Circuit breaker type	NSX100B TM100D 4P3D, C10B6TM100			NSX100B TM100D 4P3D, C10B6TM100
In	100	100	100	100	100	100
Ir	0.8 x In	0.8 x In	0.8 x In	0.7 x In	0.7 x In	0.7 x In
Im	800	800	800	800	800	800

Recommended Downstream Protection for 380/400/415 V (IEC)

UPS rating	Circuit breaker type
10 kVA	IC65N-4P-C 4A / IC65H-4P-C 4A
15 kVA	IC65N-4P-C 4A / IC65H-4P-C 4A
20 kVA	IC65N-4P-C 6A / IC65H-4P-C 6A
30 kVA	IC65N-4P-C 6A / IC65H-4P-C 6A
40 kVA	IC65N-4P-C 10A / IC65H-4P-C 10A