Page 222 - B_ELSB_Cat_2022_01_MCBs

1/222 ELECTRICAL INSTALL ATION SOLUTIONS FOR BUILDINGS - TECHNICAL DETAILS 9AKK 107991 A8329
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MCBs technical details
S800-SCL-SR range features

Group protection Current continuity
The the main application of the S800S-SCL-SR is group protec- In case of a failure by using the S800-SCL-SR as group
tion. In comparison to other short-circuit limiter you need only protection only the defective device will trip; all other
one S800S-SCL-SR for several motor starters or high perfor- devices will keep doing their work.
mance miniature circuit breakers. With the requirement that the Therefore you will have a very low breakdown, because
rated current of the short-circuit limiter does not exceed the total only one motor will stop and not all of them.
sum of the rated S800S currents of all downstream motor start-
ers or circuit breakers. Furthermore the sum of all load currents Maximum system availability is given.
including inrush currents shall not exceed the maximum permis-
sible load of the S800S-SCL-SR. Several downstream motor pro-
tection combinations or several high performance miniature cir-
cuit breakers can be protected with only one S800S-SCL-SR.

Schematic examples for rated currents up to 100 A
LINE-Protection Motor (Group)-Protection Motor (Group)-Protection
100 kA 80 kA 50 kA
L1
L2
L3

S803SCL-SR S803SCL-SR S803SCL-SR

690 V 100 kA S803SCL-SR Backup 690 V 80 kA S803SCL-SR Backup 690 V 50 kA L1 Backup
protection
protection
is given!
protection
is given!
L2
is given!
L1 L3
L2
L3
Total
690 V 4,5 kA S803S-C selectivity 690 V 4,5 kA 690 V 2 kA -F1 -F2 Total
selectivity
is given!
is given!
LOAD -F1 -F2 Total
selectivity
is given!
-K1 -K2
-K1 -K2
M M
-M1 3- -M2 3-
M M
-M1 3- -M2 3-
Short-circuit breaking capacity only downstream device
Short-circuit breaking capacity coordinated group with S800-SCL-SR
LINE-Protection Group-Protection
15 kA 15 kA
L1
L2
L3
S803HV-SCL-SR S803HV-SCL-SR
1000 V AC 15 kA Backup 1000 V AC 15 kA L1 L2 Backup
protection
is given!
L3
protection
is given!
1000 V AC 4 kA S803HV-K Total 1000 V AC 4 kA S803HV-K S803HV-K Total
selectivity
selectivity
is given!
is given!
LOAD LOAD LOAD
Short-circuit breaking capacity only downstream device
Short-circuit breaking capacity coordinated group S800-SCL-SR