The Guide - MEM Technical Support

Circuit Breaker Data

Memshield 2 K Frame

Type of Device
Rated Voltage
Frequency
Short Circuit Category = Moulded Case Circuit Breaker (MCCB)
= 690 Volts AC
= 50/60 Hertz
= Icu 36/65kA (415 Volts)

Maximum Earth Loop Impedance Zs (OHMS):
In (A)	Socket Outlet Circuits (0.4 secs)		Fixed Appliance Circuits (5 secs)
In (A)	Adjustable S/C set to min.	Adjustable S/C set to max.	Adjustable S/C set to min.	Adjustable S/C set to max.
250	-	-	-	-
320	0.125	0.0625	0.125	0.0625
400	0.100	0.050	0.100	0.050

Disconnection Time/Current Data Adjustable S/C Set to Min:
Disconnection Time (s)	60.00	10.00	5.00	1.00	0.40	0.10
In (A)	Disconnection Current (A)
250	-	-	-	-	-	-
320	900.00	1920.00	1920.00	1920.00	1920.00	1920.00
400	1500.00	2400.00	2400.00	2400.00	2400.00	2400.00

Disconnection Time/Current Data Adjustable S/C Set to Max:
Disconnection Time (s)	60.00	10.00	5.00	1.00	0.40	0.10
In (A)	Disconnection Current (A)
250	-	-	-	-	-	-
320	900.00	2500.00	3840.00	3840.00	3840.00	3840.00
400	1500.00	4800.00	4800.00	4800.00	4800.00	4800.00

MCCB Let Through Energy Data I²t (A² sec) K-Frame
Fault Level (A)	Rating
Fault Level (A)	250A	320A	400A
65000	3,500,000	4,300,000	5,500,000
50000	3,250,000	4,000,000	5,100,000
36000	2,700,000	3,400,000	4,000,000
30000	2,500,000	3,100,000	3,800,000
20000	2,000,000	2,500,000	3,000,000
16000	1,700,000	2,100,000	2,600,000
10000	1,000,000	1,200,000	1,500,000
5000	380,000	400,000	440,000
4000	220,000	240,000	250,000

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