WARNING
The vo tages from the power service are potentia y etha . Disconnect the power before
attempting insta ation or rep acement of this suppressor.
Insta ation and maintenance of the suppressor shou d be performed by a qua ified
e ectrician.
It is the responsibi ity of the insta er to ensure that a e ectrica and safety codes and
oca jurisdiction requirements are met and the suppressor is proper y insta ed.
Read these instructions comp ete y before beginning insta ation.
DESCRIPTION
– Rep ace the LDP Suppressor if a ight is out –
At the end of life, the LDP Surge Protective Device (SPD) will generally fail open circuited and
not trip a dedicated breaker if used. If the breaker is found tripped, it should be reset: If it re-
trips, replace the suppressor. If it resets and the green LEDs remain lit, the suppressor is sound
and use may be continued.
!
LDP™INSTALLATION, OPERATION AND MAINTENANCE MANUAL LDP™INSTALLATION, OPERATION AND MAINTENANCE MANUAL
INSTALLATION
E ectrica Service
The LDP Surge Suppressor shall not be connected to an electrical service with an available short
circuit current of more than 65,000 A ms. The LDP does not require an upstream over current
device. If one is used, we recommend 200A maximum. The interrupt rating of the device shall not
be less than the available short circuit current.
The LDP Suppressor is intended to be used only on grounded electrical services where the neutral
is bonded to ground at the service entrance (types USA and TN-C-S) or bonded to ground at the
source and the source grounding conductor is connected to site ground (type TNS).
The LDP Suppressor can be installed on 2-wire and 3-wire single phase, and 4-wire three phase
services. See diagrams on facing page.
Location
The LDP Suppressor may be installed on the line or load side of the main service disconnect. It
can be located indoor or outdoor; If installed outdoors in hot climates, avoid direct sun exposure.
Orient the unit so the functional status lights are visible. This unit cannot be employed on a flush
mounted load center with a finished wall surface.
Connection
Mount through ½” knockout (Ø22 mm) in the electrical panel and secure with lock nut. Black
wires connect to phase (hot) white wire to neutral bar, green/yellow wire to ground bar. Not all
models will have all wire colors.
The black or brown (hot) and white or blue (neutral) wires may connect across the main lugs or
buses in the panel (if so provisioned with connection means). The suppressor can also be connect-
ed to a double ganged breaker suitable for use with #14 wire – this method allows the device to be
isolated for test or replacement without de-energizing the electrical service. Use 20 A min circuit
breaker at main panel; use 10 A min at subpanel. To optimize protection levels: this breaker should
be adjacent to the panel’s main lugs or main disconnect breaker; minimize suppressor wires length
and avoid unnecessary bends in suppressor wires.
Monitoring
On some models the internal condition of this device and its protective function are monitored by
green LEDs on the face of the unit. When the LEDs are lit, the suppressor is functioning properly
and providing protection.
The LDP Surge Protective Device (SPD) is designed for protection of downstream distribution
equipment and wiring as we as most sensitive e ectrica and e ectronic oads from the effects of
overvo tage transients that might resu t from ightning, induction, and switching of oads or
capacitor banks. This is a ight duty device and shou d be used in minimum to moderate ightning
environments, or in high ightning areas if used downstream of a primary, heavier duty protection
device insta ed at service entrance.
Mode
LDP-yy-xxx-1
LDP-yy-xxx-2
LDP-yy-xxx-2
LDP-yy-xxx-3
LDP-yy-xxx-3
LDP-yy-xxx-4
LDP-yy-xxx-5
LDP-yy-xxx-6
20 120
25 127
30 230
277
Protection Modes
L1-N, N-G
L1-N, L2-N
L1-G, L2-G
L1-G, N-G
L1-N, L1-G
L1-N
Optimum App ication/Location
2-wire branch circuit (local lightning conditions)
3-wire service entry*
2-wire L-L branch circuit w/o neutral connected loads
2-wire incoming branch circuit, common mode light-
ning protection
2-wire branch circuit (no local lightning)
2-wire service entry*
*within 20 m of service entry, minimal lightning environment
within 10 m of service entry, moderate lightning environment
2-WIRE CIRCUITS 3-WIRE CIRCUITS
4-WIRE CIRCUITS
For single phase voltages where L-N
could be 120, 230, or 277
LDP-yy-xxx-
LDP-yy-xxx-4
LDP-yy-xxx-5
LDP-yy-xxx-6
LDP-yy-xxx-2
LDP-yy-xxx-3
For split single phase and “2-legs off a wye”
circuits L-N at 120, 230, or 277.
Service may be 120/240V 1ø 3-wire or
208Y/120V 2ø 3-wire
LDP-yy-xxx-2
LDP-yy-xxx-
For three phase circuits,
120/208, 220/380, 230/415, and 277/480
L
N
G
L
L
N
L
G
L
N
L
G
