LVD75 Series Install Sheet Datasheet by Sensata-Crydom

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Panel Mounted Low Voltage Disconnect
DC Solid State Switches
FEATURES
Wide range of output current ratings and control set points
MOSFET DC switching technology
Industry standard package
Ambient temperature compensated
Mounting on Panel
Locate the panel section on which the LVD switch will be mounted on
Be sure to use thermal pad/grease between LVD switch and the panel
Tab holes have a diameter of 0.125 in (3.2 mm). You will need two screws no longer than that to
mount the LVD switch onto panel
Align LVD switch tabs with panel surface and screw both top and bottom sides. Recommended
torque is 20 in lb (2.2 Nm)
MOUNTING INSTRUCTIONS
Mounting on Heat Sink
Select adequate heat sink (see thermal derating curves)
Be sure to use thermal pad/grease between LVD switch and the selected heat sink
Align SSR tabs with heat sink surface and screw both top and bottom sides. Recommended
torque is 20 in lb (2.2 Nm)
Please read all installation instructions before using your LVD Series switch.
Choose one of the two mounting options and follow the instructions.
PART NUMBER NOMENCLATURE
4075 ALVD
Series
Max DC Output Voltage
75: 3-75 Vdc
Control Set Points
A:18 Vdc max., Hysteresis 11.0-11.5 Vdc
B:18 Vdc max., Hysteresis 11.5-12.0 Vdc
C: 18 Vdc max., Hysteresis 12.0-12.5 Vdc
D:36 Vdc max., Hysteresis 23.0-24.0 Vdc
E: 36 Vdc max., Hysteresis 24.0-25.0 Vdc
F: 36 Vdc max., Hysteresis 25.6-26.6 Vdc
Output Current
40: 40 Amp
60 Amp
80: 80 Amp
60:
100: 100 Amp
Options
H: Thermal Pad
Required for valid part number
For options only and not required
for valid part number
H
Rev: 111710
Crydom LVD Series Solid State Switches were developed to offer the advantages of Crydom’s thermal
management technology in a switch that monitors a system’s battery voltage and disconnects the battery from
the system when it’s voltage falls below a preset low voltage value.
LVD Series
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DERATING CURVESWIRING DIAGRAMS
Maximum Recommended Terminal
Screw Torque [in/lbs] (Nm)
Input 8-10 (0.9-1.1) / Output 18-20 (2.0-2.2)
Input Terminal Wire Capacity
12 AWG (2.5 mm)
Output Terminal Wire Capacity
Select wire size depending on current
When wired as above the maximum battery voltage is limited to 36 Vdc
Typical LVD Connection Wiring diagram does not feature electric isolation
between Input (1, 2) and Output (3, 4) terminals
(A)
(B)
(A, B)
WARNING
RISK OF MATERIAL DAMAGE AND HOT ENCLOSURE
• The product's side panels may be hot, allow the product to cool before touching.
• Follow proper mounting instructions including torque values.
• Do not allow liquids or foreign objects to enter this product.
Failure to follow these instructions can result in serious injury, or equipment damage.
HAZARD OF ELECTRIC SHOCK, EXPLOSION OR ARC FLASH
Turn off power supply before working on this equipment.
Failure to follow these instructions will result in death or serious injury.
DANGER
Rev: 111710
Power Dissipation [W]
Load Current [Arms] Ambient Temperature [°C]
10
20
30
40
50
0
10 20 30 40 20 40 60 80
0
40 Amps
1°C/W
2°C/W
3°C/W
No Heat Sink
0.5°C/W
Power Dissipation [W]
Load Current [Arms] Ambient Temperature [°C]
10
20
30
40
50
60
70
80
0
20 40 60 20 40 60 80
0
60 Amps
0.5°C/W
1°C/W
2°C/W
3°C/W
No Heat Sink
Power Dissipation [W]
Load Current [Arms] Ambient Temperature [°C]
10
20
30
40
50
60
70
80
90
0
20 40 60 80 20 40 60 80
0
80 Amps
1°C/W
2°C/W
3°C/W
No Heat Sink
0.5°C/W
Power Dissipation [W]
Load Current [Arms] Ambient Temperature [°C]
10
0
20
30
40
50
60
70
80
90
100
20040 60 80 100 20 40 60 80
100 Amps
No Heat Sink
3°C/W
2°C/W
1°C/W
0.5°C/W
LOAD 1
-
2
+
4
-
3
+
+VDC
DC Input
BASIC WIRING
LOAD
BATTERY
1
-
2
+
4
-
3
+
+
TYPICAL LVD CONNECTION
Rating - Heat Sink part number
0.5°C/W - HS053
1°C/W - HS103/HS103DR
2°C/W - HS201/HS201DR
3°C/W - HS301/HS301DR

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