Cut Sheet

© 2017 Littelfuse Protection Relays & Controls
Personnel Protection
ORDERING
NUMBER
VOLTAGE
(V)
TRIP
LEVEL (mA)
UL CATEGORY/CLASS
SB6100-00x-0 208
20
(Fixed)
UL 943C Class C
special-purpose GFCI
SB6100-10x-0 240
SB6100-20x-0 480
SB6100-30x-0 600
UL 943C Class D
special-purpose GFCI
SB6100-01x-0 208
6, 10-100 in
increments
of 10
UL 943/UL 1053
Equipment ground-fault
protective device (EGFPD)
SB6100-11x-0 240
SB6100-21x-0 480
SB6100-31x-0 600
Ordering Information
FEATURES BENEFITS
UL 943 inverse time trip curve
Detects and interrupts to protect people and reduce the
probability of nuisance tripping
Minimum trip time < 20 msec
Reduces the risk of ventricular fibrillation for leakage current
of 250 mA and above
UL 943C fixed trip level
(GFCI 20 mA)
Personnel protection for systems with leakage current higher
than the standard 6 mA required by UL 943 Class A
Selectable trip levels
(EGFPD)
Provides extra safety when a customer is able to operate with a
setting below 20 mA (GFCI) and the settings above 20 mA can
reduce nuisance tripping on systems with high leakage current.
UL 943C ground monitor/
interrupt
Protects from shock by tripping if continuity of ground wire
between Industrial Shock-Block and load is broken.
Undervoltage, brownout,
chatter detection
Ensures proper operation and prolongs the internal
contactor lifetime
3 x Class T, 600 V
incoming fuses
The fuses provide overcurrent protection for a 100 A circuit and
a higher short-circuit current rating (SCCR) of 50 kA.
Conformal coating
Internal circuits are conformally coated to protect against
corrosion and moisture, yet still repairable
Operator Interface
Shows unit status, alarm types, percentage of leakage current,
and allows for Test and Reset capabilities
Auxiliary Contact Provides a normally-open contact for remote indication
Automatic Self-Test
All ISB options (revision 01 or higher) include an automatic
self-test feature
Motor Starter Allows the user to start and stop the motor from the interface
Features & Benefits
Simplified Circuit Diagram
Industrial
AUXILIARY
CONTACT
K
LOAD
SB-OPI
(Operator
Interface)
G
TERMINATION
DEVICE
ENCLOSED SB6100 MODELS
G
L1
L2
L3
SB6100
*
GC
* For a single-phase load; Jumper L
2
& L
3
& use L
1
& L
2
as the input terminals
A
B
Note: x=0 for open-chassis models and 1 for enclosed models
Description
Special-Purpose Ground-Fault Circuit Interrupter (GFCI),
Class C and Class D
Industrial Shock Block (ISB) is a personnel protection device designed to
meet the new requirements for special-purpose GFCIs defined by UL 943C.
ISB is the first permanently connected Class C and Class D GFCI on the
market. Class C GFCIs are intended to be used on three-phase systems
where the line-to-line voltage is 480 V or less with a trip level of 20 mA,
while Class D GFCIs are intended to be used on 600 V systems. These
improvements to the standard Class A GFCI (6 mA trip level used on 240 V
systems or less) were made to allow the use of GFCIs in industrial facilities.
The ISB includes an automatic self-test feature and is compliant to the
UL1998 Software in Programmable Components standard.
Equipment Ground-Fault Protective Device (EGFPD)
ISB is also available with adjustable protection settings as an EGFPD. The
EGFPD models can be set to trip at 6 mA or from 10-100 mA in increments
of 10 mA. This offers more flexibility since GFCI devices are not allowed to
have an adjustable trip level.
Rating and Models
ISB (GFCI & EGFPD) is available for three-phase voltages from 208 to 600
V with a maximum full load current of 100 A, and a built-in overcurrent
protection supplied by Littelfuse Class T fuses. The load must be 3-phase,
however, cannot have a neutral. The power system can either be solidly-
grounded or high-resistance grounded.
Two options for enclosures are available: UL-recognized open-chassis models
are available for installation in existing electrical enclosures and UL-listed
enclosed models include a NEMA-4X enclosure for stand-alone installations.
Ground Wire (Load-Ground) Monitor
The ISB also monitors the ground wire (load-ground) connection between the
ISB and load. This is a required feature for GFCI devices and is optional for
EGFPD devices. If the connection is broken, the ISB will provide an alarm by
changing the state of the alarm contacts. This monitoring circuit includes an
extra wire (pilot wire) between the ISB and load (since the monitoring current
is low, only a small wire is required). At the load, the pilot wire is connected to
a termination device. The other end of the termination device is connected to
the load ground (typically the enclosure).
© 2018 Littelfuse Protection Relays & Controls
Littelfuse.com/IndustrialShockBlock
*Patented
Rev: 4-K-060718
Based on Manual Rev. 1-H-032618
SB6000 SERIES
Industrial Shock-Block
Open-Chassis Model*Enclosed Model*
Operator Interface*