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1/05 

Trip Class 

Application Description 

Small fractional horsepower motors where acceleration times are almost 
instantaneous or where extremely quick trip times are required 

10 

(

Fast Trip) Hermetic refrigerant motors, compressors, submersible 

pumps and general-purpose motors that reach rated speed in less than 4 
seconds.

 

15 

Specialized applications. 

20 

(Standard Trip) Most NEMA-rated general-purpose motors will be 
protected by this setting. 

30 

(Slow Trip) Motors with long acceleration times (>10 seconds) or high 
inertia loads. 

J Prefix 

Programming any of the trip classes with the J prefix will enable jam 
protection. This additional protection is enabled 1 minute after the motor 
starts and provides a 2 second trip time for motors exceeding 400% of 
the OC setting, regardless of trip class. 

 

Table 2: Trip Class Descriptions 

 
 
 

 

 

Figure 4: Overload Trip Curves 

Summary of Contents for 777-TS

Page 1: ...perages from 26 90 amps insert the motor conductors through the holes marked A B and C Make certain the conductor through each hole corresponds to the right motor conductor i e the A phase conductor s...

Page 2: ...XTERNAL CTs REQUIRED SEE FIGURE 2 FOR WIRING EXTERNAL CTs 91 110 5 100 100 5 111 160 5 150 150 5 161 220 5 200 200 5 221 320 5 300 300 5 321 420 5 400 400 5 421 520 5 500 500 5 521 620 5 600 600 5 621...

Page 3: ...3 1 05 Figure 2 Typical Wiring Diagram Using External CTs Figure 3 Looping Example Showing Three Conductors MULT 3 from table 1 No other necessary connections are shown...

Page 4: ...efore the maximum deviation from the average is 5 3 The VUB is then 5 3 208 3 x 100 2 5 The TS setting allows the user to turn the temperature sensor trip function on or off MULT MULT multiplier setti...

Page 5: ...ck position to the 11 o clock position ADDR settings start after the 11 o clock position RU of restarts after an undercurrent is the number of restarts after an undercurrent trip condition before the...

Page 6: ...ntil all parameters are programmed OPERATION The relay operation of the Model 777 TS is designed to be fail safe This means when everything is within the limits programmed into the unit the relay will...

Page 7: ...15 Specialized applications 20 Standard Trip Most NEMA rated general purpose motors will be protected by this setting 30 Slow Trip Motors with long acceleration times 10 seconds or high inertia loads...

Page 8: ...n e g worn bearings oc should not be included in the RF setting so that a manual reset after an overload fault is required A RF 1 will give the system 1 chance to recover from an unbalance or single p...

Page 9: ...ual line line voltage The display is also used for programming the operating parameters of the device The display also identifies what caused the unit to de energize its relay or what is keeping the u...

Page 10: ...vides isolation signal conditioning for compatibility with Modbus RTU and RS 485 networks and provides terminals for terminating the shielded communications cable Up to 99 units can be installed on on...

Page 11: ...meter value The incoming voltage is not within the limits programmed in the VUB HV and LV settings Adjust the DISPLAY PROGRAM switch to read the incoming line voltage values Correct the incoming power...

Page 12: ...irect Trip Times Those not shown have user selectable trip times Ground Fault Trip Time 101 200 of Setpoint 201 300 of Setpoint 301 400 of Setpoint 401 or Greater Trip time 8 seconds 1 second 4 second...

Page 13: ...C Undercurrent Threshold 0 10 98A MULT or 40 100 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 RD1 Rapid Cycle Timer 0 2 500 Seco...

Page 14: ...button 4 Turn MODE SELECT switch to RUN The program is now locked but all settings can be viewed The unit can be unlocked by following the same steps except adjust the DISPLAY PROGRAM knob to unL in...

Page 15: ...ng s electrical installation in order to be available to the authority having jurisdiction 9 Confirm programmed parameters and proceed with installation instructions GROUND FAULT TEST RESULTS Date Per...

Page 16: ...16 1 05 Visit our website at www symcominc com for our complete catalog and new product listings 2880 North Plaza Drive Rapid City SD 57702 800 843 8848...

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