Bourns 1251 Series User manual

1251 & 1252 Series
Hardwired AC Hybrid H-SPD
INSTALLATION INSTRUCTIONS
Specifications are subject to change without notice.
The device characteristics and parameters in this data sheet can and do vary in different applications and actual device performance may vary over time.
Users should verify actual device performance in their specific applications.
Technical Data
ATTENTION!
• Installation must be performed only by a properly trained
operator or an electrician.
• Applicable electrical installation rules must be followed.
• The unit must be used only as a surge protector and according
to the conditions described in this document.
• The device must be selected in relation to a dedicated AC
network (see Technical Data).
• If LED lights are OFF, the surge protector must be replaced.
Specication
Model
1251-
120S-
N1
1251-
240S-
N1
1251-
208Y-
N1
1251-
120S-
N2
1251-
240S-
N2
1251-
208Y-
N2
1252-
120S-
N1
1252-
240S-
N1
1252-
208Y-
N1
1252-
120S-
N2
1252-
240S-
N2
1252-
208Y-
N2
Single Phase ••••
Split Phase ••••
Wye ••••
Type 1 2
Max. Discharge
Current by Mode
(Imax)
50 kA
Nom. Discharge
Current by Mode
(In)
20 kA
MCOV L-N
(Vac) 140
MCOV L-L
(Vac) N/A 280 280 N/A 280 280 N/A 280 280 N/A 280 280
NOTES:
Model 1252 Series contains a lter.
N1: For the side nipple.
N2: For the nipple in the back.
Asia-Pacic: Tel: [phone] • Email: [email protected]
EMEA: Tel: [phone] • Email: [email protected]
The Americas: Tel: [phone] • Email: [email protected]
www.bourns.com

Installation
Specifications are subject to change without notice.
The device characteristics and parameters in this data sheet can and do vary in different
applications and actual device performance may vary over time.
Users should verify actual device performance in their specific applications.
07/16
1251 & 1252 Series
Hardwired AC Hybrid H-SPD
INSTALLATION INSTRUCTIONS
Fusing installation not required but recommended for Type 1
SPD installation according to UL 1449. Mandatory for Type 2.
L2
L1
L3
N
GND
Main switchboard
or sub-panel
F1
1. Disconnect breaker supplying all power to the equipment
prior to SPD installation.
2. See Figure 1.
3. Conrm Model 125x Series device is rated for your
system by comparing voltage measurements to the
Line Voltage on the product label.
4. Install in accordance with the applicable electric code in
your area.
5. Conrm that the electrical terminals used to attach this
device are identied for these conductors.
6. Twist conductors 1/2 turn or more for every 12 inches of
length.
7. Keep conductor length as short as possible with no sharp
bends.
8. Do not loop or coil wires.
9. Ensure a high quality ground is in place.
Maintenance
Figure 1
Wiring Dimensions (inches)
L2
L1
L3
N
GND
White wire
White wire
Black wires
Black wires
Green/Yellow wire
Version N2
Green/Yellow wire
Version N1
0.79
0.78
0.83
3.46
4
0.81
2.44
Panel
wall
Nut
13 mm (0.5 in.) knockout (trade size)
Actual hole size 22 mm (.875 in.)
Introduce accessory
on SPD output for tightness
Diagnostic Operation
LED ON = Normal operation.
LED OFF (one or more) = Fault, check phase voltage and
connections. If okay, replace unit.
AUDIBLE ALARM ON = Fault, check phase voltage and
connections. If okay, replace unit.
: ALL LED ON = system fully protected
: 1, 2 or 3 LED OFF = system unprotected
and replace
with 125x-xxx-Nx
: ALL LED ON = system fully protected
: 1, 2 or 3 LED OFF = system unprotected
and replace
with 125x-xxx-Nx