LVD Series Panel Mounted Low Voltage Disconnect DC Solid State Switches 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. 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) PART NUMBER NOMENCLATURE FEATURES Wide range of output current ratings and control set points MOSFET DC switching technology Industry standard package Ambient temperature compensated Series LVD Max DC Output Voltage 75: 3-75 Vdc 75 40 H 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 MOUNTING INSTRUCTIONS Please read all installation instructions before using your LVD Series switch. Choose one of the two mounting options and follow the 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) A Output Current 40: 40 Amp 60: 60 Amp Options 80: 80 Amp 100: 100 Amp H: Thermal Pad Required for valid part number For options only and not required for valid part number Rev: 111710 WIRING DIAGRAMS DERATING CURVES 4 - + - +VDC 2 +3 1°C /W 40 80 0.5 °C /W Power Dissipation [W] Output Terminal Wire Capacity Select wire size depending on current 1 60 Amps 50 Power Dissipation [W] LOAD Input Terminal Wire Capacity 12 AWG (2.5 mm) 40 Amps BASIC WIRING Maximum Recommended Terminal Screw Torque [in/lbs] (Nm) Input 8-10 (0.9-1.1) / Output 18-20 (2.0-2.2) 30 2°C/W 3°C/W 20 10 No Heat Sink 0 DC Input 10 20 + 1 (A) (B) - + 2 2°C /W 3°C/W 40 30 20 No Heat Sin k 10 40 20 40 60 0 80 40 20 60 Load Current [Arms] Ambient Temperature [°C] 80 Amps BATTERY 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 80 1° C/ W 70 60 50 0.5 °C /W 2°C /W 3°C/W 40 30 20 No Heat Sin k 10 0 0 20 40 60 Load Current [Arms] 80 20 40 60 80 Ambient Temperature [°C] 100 Amps 90 +3 WARNING 50 20 40 60 80 Ambient Temperature [°C] DANGER 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. HAZARD OF ELECTRIC SHOCK, EXPLOSION OR ARC FLASH Failure to follow these instructions can result in serious injury, or equipment damage. Failure to follow these instructions will result in death or serious injury. • Turn off power supply before working on this equipment. 100 90 80 70 60 50 40 30 20 10 0 /W °C 0.5 4 - Power Dissipation [W] LOAD 30 Load Current [Arms] Power Dissipation [W] (A, B) 0.5 °C /W 1°C /W 0 0 TYPICAL LVD CONNECTION 70 60 1° C/ W 2°C /W 3°C/W No Heat Sink 0 20 40 60 80 Load Current [Arms] 100 20 40 60 80 Ambient Temperature [°C] 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 Rev: 111710