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Littelfuse 77C-KW/HP Pump Monitor Overload Relay 100-240V Single Phase 2-800FLA
Littelfuse 77C-KW/HP Pump Monitor Overload Relay 100-240V Single Phase 2-800FLA
SKU : MSR77CKWHP
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$558.05 USD
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Description
Description
Littelfuse 77C-KW/HP Pump Monitor Product Description
The 77C-KW/HP and 77C-LR-KW/HP are fully programmable pump protection relays which will monitor the voltage and current for high or low voltage, overload and underload conditions based on power, in one package. The underpower trip feature is desirable anytime the current vs. load characteristic is non-linear or has little change. In general terms, smaller motors and slow-speed motors have little change in current over the normal load range. Larger motors that are running light loads will also show small current changes over the operating load range. Common uses include pumping applications where motors run slower than around 3400 rpm and usually have small current vs load changes; such as slow speed mixer or agitator motors up to 50 hp, and magdrive or can pumps. The Littelfuse PumpSaver® relay provides the high sensitivity of a power monitor to protect pump motors from dry run and deadhead conditions.
The 77C-KW/HP Provides 480 VA @ 240 V ac output SPDT (Form C) relay contacts.
Littelfuse 77C-KW/HP Pump Monitor Typical Application
- Conveyor Systems
- HVAC Equipment
- Saws and Grinders
- Fan Motors
- All Pumping Applications With Single-Phase Electric Motors
Littelfuse 77C-KW/HP Pump Monitor Technical Details
- Protects Single-Phase Motors From:
- Overload
- Underload
- Jams
- Low Voltage
- High Voltage
- Rapid Cycling
- Fully Programmable
- Automatic Reset With Three Separate Restart Delay Timers, or Manual Reset
- Tamper Guard
- RS-485 Communications Port (Communications Module Sold Separately)
- 3-digit LED Diagnostic Display
- Remote Reset
- Last Fault Memory
- UL and cUL Listed
- CE Compliant
- CSA Approved
- Surface or DIN Rail Mount
- 5-year Warranty
- Made in USA
Specifications
Specifications
Littelfuse 77C-KW/HP Pump Monitor Specifications
Input Voltage . . . . . . . . . . . . . . . . . . . . . 100-240 VAC, 1Ø
Frequency . . . . . . . . . . . . . . . . . . . . 50/60Hz
Motor Full Load Amps
- . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-25 Amps, 3Ø(Loops Required)
- . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26-90 Amps, 3Ø(Direct)
- . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91-800 Amps, 3Ø(External CT’s)
Short Circuit Withstand Rating . . . . . . . . . . . 100kA per UL and CSA
Power Consumption . . . . . . . . . . .5W (Maximum)
Output Contact Rating
- SPDT-Form C . . . . . . . . . . . . . . . .480VA @ 240VAC Pilot Duty
- . . . . . . . . . . . . . . . . . . . . 10A @ 240VAC General Purpose
Expected Life
- Mechanical . . . . . . . . . . . . . . . . .1 x 106 operations
- Electrical . . . . . . . . . . . . . . . . .1 x 105 operations at rated load
Accuracy at 25° C (77° F)
- Voltage. . . . . . . . . . . . . . . . . . . . . . . . ±1%
- Current . . . . . . . . . . . . . . . . . ±3% (Direct, No External CT’s)
- Timing . . . . . . . . . . . . . . . . 5% ± 1 second
Repeatability
- Voltage. . . . . . . . . . . . . . . . . . . . . . . . ±0.5% of nominal voltage
- Current . . . . . . . . . . . . . . . . . . . . . . ± 1% (Direct, No External CT’s)
Safety Marks
- UL . . . . . . . . . UL508, UL1053
- CE. . . . . . .IEC 60947-1, IEC 60947-5-1
Electorstatic Discharge (ESD) . . . . . . . . . IEC 61000-4-2, Level 3, 6kV contact, 8kV air
Radio Frequency Immunity (RFI), Conducted . . . . . . . . .IEC 61000-4-6, Level 3 10V/m
Radio Frequency Immunity (RFI), Radiated . . . . . . . . .IEC 61000-4-3, Level 3 10V/m
Fast Transient Burst . . . . . . . . .IEC 61000-4-4, Level 3, 3.5kV input power
Surge
- IEC . . . . . . . . . 1000-4-5, Level 3, 2kV line-to-line; Level 4
Terminal Torque . . . . . . . . . . . . . . . . . . 7 in.-lbs
Enclosure Material . . . . . . . . . polycarbonate
Weight . . . . . . . . . . . . . . . . . . . . . . . . 1.2 lbs<
Temperature Range
- Ambient Operating . . . . . . . . . -20° - 70° C (-40° - 158°F)
- Ambient Storage . . . . . . . -40° - 80° C (-40° - 176°F)
Class of Protection . . . . . . . . . . . . . . . . . . . . IP20, NEMA 1
Relative Humidity . . . . . . . . . . . . . . . . . . . . . 10-95%, non-condensing per IEC 68-2-3
Programable Operating Points
- LV-Low Voltage Threshold . . . . . . . . . 85V - HV Setting
- HV-High Voltage Threshold . . . . . . . LV Setting - 264V
- MULT-# of Conductors or CT Ratio (XXX:5) . . . . . . . 1-10 Conductors or 100-800 Ratio
- OC-Overcurrent Threshold . . . . . . .(20-100A) ÷ MULT or 80-120% of CT Primary
- CUB-Current Unbalance Threshold . . . . . . .2 - 25% or 999
- TC-Overcurrent Trip Class*> . . . . . . . 5, J5, 10, J10, 15, J15, 20, J20, 30, J30, or LIn (linear)
* If J Prefix is displayed in trip class setting, jam protection is enabled. If programmed to Lin position, overcurrent trip delays are fixed linear-type delays set in OPT1 position
WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov
Resources
Resources
Littelfuse 77C-KW/HP Pump Monitor Resources
Littelfuse 77C-KW/HP Product Specifications
Warranty
Warranty
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