Littelfuse Industrial Shock Block SB5000 Series, Руководство пользователя

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SB5000 Industrial Shock Block
Page 2
Rev. 1-B-101821
1.1.3 SB5000 EGFPD
EGFPD models can be set to trip at
6 mA or from 10 to 100 mA in increments of 10 mA, and
meet
the requirements of UL 943 and
UL 1053. The adjustable trip level can help prevent
nuisance tripping in some applications.
If required by the application, a load-ground-
connection monitor feature can be enabled for EGFPD
models. See Section 2.5.
1.2 F
EATURES

UL 943 inverse time curve reduces the probability of
nuisance tripping.

UL 943 fixed trip level (Class A GFCI models)
provides protection meeting NEC 210.8 (B) for
commercial kitchens, wet areas, and other
applications.

UL 943C fixed trip level (GFCI models) provides
protection for systems with leakage current higher
than the 6-mA trip level required by Class A GFCIs.

Selectable trip levels (EGFPD models) help reduce
nuisance tripping by allowing users to adjust the trip
level in systems that have leakage current higher than
UL 943 Class A 6-mA trip level
,
or UL 943C Class C
or D 20-mA trip level.

UL 943C ground-connection monitoring ensures
continuity of the load ground.

Undervoltage, brown-out and chatter detection
prolong the internal contactor lifetime.

Meets UL 1998 requirements.

Self-test feature continuously monitors hardware to
ensure safe operation.

Conformally coated circuit boards.
1.3 O
PERATOR
I
NTERFACE
The operator interface includes LED status indication
including the following:
- POWER
- ENABLE
- GF TRIP
- GC STATUS
- TEST and RESET buttons
2. I
NSTALLATION
The SB5000 is considered to be a permanently mounted
GFCI/EGFPD and should be attached to a wall or other
suitable mounting surface.
The connection diagram for three-phase systems is
shown in Fig. 2. Ensure that all conductors have the
required voltage and current ratings necessary for the
application. SB5000 installation should be performed by
a qualified person.
2.1 M
OUNTING
Install SB5000 models in the correct orientation as
shown in Fig. 5, and refer to the ‘This Side Up’ label
attached to the side of the enclosure.
Enclosed models ship with no cable entry points
predrilled. Appropriate holes must be made in the
enclosure and fitted with NEMA-4X-rated (and IP69K-
rated when required) fittings for the installation of all
conductors. Space is left near the bottom or lower sides
of the enclosure to install the wiring. See Figs. 3 and 6.
2.2 S
UPPLY
C
ONNECTIONS
The supply phases are marked Input A, B, and C on the
base of the chassis as shown in Fig. 3. Use a flat-blade
screwdriver to tighten the input connections. Torque the
input terminals as described in Section 6. The input
terminals will accept 4 to 18 AWG copper wire
conductors.
2.3 L
OAD
P
HASE
C
ONNECTIONS
The load phases are marked Output A, B, and C on the
base of the chassis as shown in Fig. 3. Use a flat-blade
screwdriver to tighten the output connections. Torque the
output terminals as described in Section 6. The output
terminals will accept 4 to 18 AWG copper wire
conductors.
2.4 G
ROUND
C
ONNECTIONS
Connect the supply and load ground conductors to the
chassis bonding point
( ) as shown in Fig. 3. Use a flat-
blade screwdriver to tighten the ground connections.
Torque the ground terminals as described in Section 6.
The ground terminals will accept 14 to 1/0 AWG (2.08 to
53.5 mm
2
) conductors.
2.5 L
OAD-
G
ROUND-
C
ONNECTION
M
ONITOR
An insulated pilot wire from the SB5000 to the load,
and a termination device located at the load are required
to monitor the load-ground connection. Total pilot wire
and ground wire resistance must be less than 28 ohms (trip
resistance is 38 ohms). Outline dimensions and mounting
details for compatible termination devices are shown in
Figs. 7, 8, and 9.
This monitoring function is required for Class C and
Class D GFCI models installed in NEC applications, and
can be implemented if desired for Class A GFCI or
EGFPD models.
Use only a Littelfuse termination device as others may
not meet performance requirements. Each SB5000 GFCI
is supplied with a 1N5339B termination device. Install
the termination device at the load to complete the ground-
connection loop as shown in Fig. 2. Connect terminal G
of the termination device to the equipment frame so that
the ground-conductor-to-equipment-frame connection
will be included in the monitored loop. Connect terminal
GC of the termination device to the pilot wire, and connect