Results You searched for: ETI Model SC-40C Snow/Ice Melting Satellite Contactor. Modular Snow/Ice Heater Control System Results Displayed: 1 - 10 of 10
ETI Snow Switch Model SC-40C Snow/Ice Melting Satellite Contactor. Modular Snow/Ice Heater Control System
The SC–40C Satellite Contactor answers the need for cost effective modular snow melting heater control. One or more SC–40Cs, when used with an APS–4C Control Panel acting as the master control, allow for modular snow melting system design. There is no limit to the number of SC–40Cs that can be interfaced in a single system. This approach reduces front end design, hardware and installation costs while providing a number of useful features that would be otherwise too expensive and complex to implement.
The SC–40C provides the same advanced patented and patent pending Ground Fault Equipment Protection (GFEP) as required by the USA and Canadian National Electric codes that is found on the APS–4C. Upon sensing a ground fault condition, an SC–40C inhibits operation of its contactor until manually reset. Circuits without a ground fault continue to operate normally thus partitioning defective heaters.
The adjustable hold-on timer continues heater operation on each SC–40C for up to 10 hours after snow stops to ensure complete melting and to compensate for differences between zones. The optional RCU–4 Remote Control Unit can be located where system operation can be conveniently observed. It duplicates many of the controls and indicators on the SC–40C front panel.
Each SC–40C provides a complete energy management computer (EMC) interface. This feature provides remote access for advanced applications requiring remote or zone control along with remote annunciation.
Each SC–40C maintains communications to and from the APS–4C using a 3-wire cable. Thus, the APS–4C alarms ground faults occurring anywhere in the system. This feature inserts a short time delay between the operation of each contactor thus improving power quality by limiting the inrush current. The RCU–4 Remote Control Unit supplied permits overriding zone control in applications requiring the capability.
The SC–40C is interchangeable with the earlier SC–40.
Entries 1 × 1-1/16" entry (top) for NEC Class 2 connections 2 × 1-11/16" entries (bottom) for supply and load power, except 277 VAC single phase 2 × 1-1/16" entries (bottom) for supply and load power, 277 VAC single phase only
Mounting Wall mounted
Number of cascaded units Unlimited
Contactor delay 5 second
Bus-wire type 3-wire jacketed cable
Circuit type NEC Class 2
Lead length Up to 500' (152m) using 18 AWG 3-wire jacketed cable Up to 1,000' (504m) using 12 AWG 3-wire jacketed cable
Supply ETI PN 22477: 208-240 VAC, 35 VA, 3-phase 50/60 Hz ETI PN 22478: 277 VAC, 45 VA, single phase 50/60 Hz ETI PN 22480: 277/480 VAC, 45 VA, 3-phase 50/60 Hz ETI PN 22481: 600 VAC, 50 VA, 3-phase 50/60 Hz
Load ETI PN 22477: 208-240 VAC, 50 amp max. resistive ETI PN 22478: 277 VAC, 40 amp max. resistive ETI PN 22480: 277/480 VAC, 50 amp max. resistive ETI PN 22481: 600 VAC, 50 amp max. resistive
Contact type 3 Form A
Maximum Ratings Voltage: 600 VAC Current: 50 amps
Heater hold-on timer 0 to 10 hours; actuated by toggle switch
System test Switch toggles the heater contact on and off. If temperature exceeds high limit, heater cycles to prevent damage.
Ground Fault Equipment Protection (GFEP)
Set point 30 mA (default); 60 mA and 120 mA selectable by DIP switch
Automatic self-test Mode A: Verifies GFEP function before contactors operate Mode B: Verifies GFEP and heaters every 24 hours
Manual test/reset Toggle switch provided for this function
Maintenance facility DC output proportional to ground current provided for troubleshooting the heater system
High Limit Thermostat
Adjustment range 40°F to 90°F (4°C to 32°C)
Dead band 1°F (0.6°C)
Sensor type Thermistor network
Circuit type NEC Class 2
Lead length Up to 500' (152m) using 18 AWG 2-wire jacketed cable Up to 1,000' (504m) using 12 AWG 2-wire jacketed cable
Energy Management Computer (EMC) Interface
Inputs OVERRIDE ON (10 ma dry switch contact) OVERRIDE OFF (10 ma dry switch contact)
Outputs SUPPLY (10 ma dry switch contact) SNOW (10 ma dry switch contact) HEAT (10 ma dry switch contact) HIGH TEMP (10 ma dry switch contact) ALARM (10 ma dry switch contact)
Operating temperature -40°F to 160°F (-40°C to 71°C)
Storage temperature -50°F to 180°F (-45°C to 82°C)