Hoffman controls 610-3PH Digital Overcurrent & Temperature Motor Protector

Description

The Model 610-3PH Digital Current Monitor consists of a Kydex covered PCB (on standoffs) with a 32-character LCD display and four push buttons. The LCD screen displays 1) real time motor currents, 2) real time compressor temperatures (when activated) and 3) trip related operational information. The four push buttons allow the installer to 1) set up the controls over current trip values, 2) set up the under/over temperature trip values, 3) select the trip auto reset and alarm options and 4) select the Modbus RTU communications options.

Input power is provided by 24v AC to designated terminals on the controller. Two sets of isolated Form C (N.O./N.C.) relay contacts are also provided. The “TRIP” relay’s “N.O.” to “COM” contact is closed for all, powered on, conditions below the “trip” Trip level is adjustable for any current for the type of load, service factor, and/or insulation rating of the motor. The trip level may be set above nominal full load amps (FLA) to obtain the degree of protection required by the application. For part winding motor applications, divide FLA by two since each winding carries 1/2 of the current.

Single phase, three phase, and three phase part winding applications are incorporated.

Applications

• Field selectable current trip level adjustment from 5 to 200 amps.
• Field selectable exhaust temperature trip level adjustments from 80°F to 300°F or 100 to 20000 ohms, depending on sensor type.
• Field selectable oil temperature trip level adjustments from 20°F to 200°F or 250 to 50,000 ohms, depending on sensor type.
• Manual push button reset or Modbus RTU remote reset.
• Current transformers (C.T.s) remote from logic.
• Two isolated output Form C (N.O./N.C.) control circuits. One Trip and one Alarm.
• Accurate positive over current protection with a no nuisance trip function.
• Trips on adjustable phase imbalance for three phase systems.
• A selectable number of automatic trip resets with adjustable time delay between trip and reset.
• Detects improper phase rotation.
• All sensor readings and trip information can be read remotely over Modbus RTU and all parameters can be set over Modbus RTU.

Specification

• Voltages, Input & Output:  24v AC
• Power: 2.5 VA
• Frequency:  60 Hz
• Response Time to Trip:
  Minimum 2 Sec. @ LRA
  Maximum 20 Min. @ 1.02% FLA
• Trip Current Range, Min./Max.:  5 to 200 Amps
• Trip Level Setting:  Adjustable
• Relay Rating:
  Volts 24 VAC
  Current (Max,) 10 Amps
• Ambient Temperature Range:  -20°C to 70°C
  Operating & Storage -4°F to 158 °F
• Dimensions (L x W x H):  4.75″ x 4″ x 1.25″
• Available Models:
  1) Model 610-1PH Single phase motor protection.
  2) Model 610-3PH Three phase motor protection.
  3) Model 610-1PH(MOD) Single phase motor protection with Modbus RTU.
  4) Model 610-3PH(MOD) Three phase motor protection with Modbus RTU.

Documents PDF’s

• Model 610 Digital Current Monitor