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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. 

LXX 

This is linear overcurrent setting, where XX is the number of seconds for 
a linear trip. 

Other Trip 

Classes

 

Trip Time in seconds at 6x OC=(TC*.93359s) 

 

Table 3: Trip Class Descriptions 

 

 

Figure 4: Overload Trip Curves 

 

8 - 

 

6/07 A1

Summary of Contents for MotorSaver Plus 777-575-P

Page 1: ...ps onto the rail 3 A For amperages from 25 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...

Page 2: ...0 3 3 32 6 3 3 12 25 10 50 3 0 5 49 2 2 25 90 20 100 0 10 98 1 1 80 110 80 140 0 40 140 5 100 100 5 110 160 120 210 0 60 210 5 150 150 5 160 220 160 280 0 80 280 5 200 200 5 220 320 240 420 0 120 420...

Page 3: ...Figure 2 Typical Wiring Diagram Using External CTs Figure 3 Looping Example Showing Three Conductors MULT 3 from Table 1 3 6 07 A1 No other necessary connections are shown...

Page 4: ...7 210 208 3 1 7 and 208 3 203 5 3 The maximum deviation from the average is 5 3 thus voltage unbalance 5 3 208 3 x 100 2 5 MULT MULT multiplier setting is found on Table 1 The MULT setting is determi...

Page 5: ...hase or RP reverse phase condition exists when power is applied to the device the output relay will energize the NO will close and the NC will open as soon as RD1 expires Typically this is set to 20 3...

Page 6: ...only used when communicating with an RM 2000 RM 1000 COM DN CIO DN a PLC or a PC The address can be 1 99 A01 A99 RF RF is the number of restarts the 777 P will attempt after current unbalance or curre...

Page 7: ...played will be the number corresponding to where the DISPLAY PROGRAM knob is pointed It will do this for the amount of time programmed into RD1 After this time has expired the relay will energize NO c...

Page 8: ...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 prote...

Page 9: ...RD3 does not have any function RF Because an overload overcurrent fault signals a serious problem in this application e g worn bearings oc should not be included in the RF setting so that a manual res...

Page 10: ...h line current or each individual 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...

Page 11: ...tion 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 one RS 485 ne...

Page 12: ...rameter 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 pow...

Page 13: ...rmer must be between 115 and 150 of the GF setting and pass through only one CT window 5 The values of V and R will be determined by the current required to generate a GF trip condition I Vrms R where...

Page 14: ...14 6 07 A1 GROUND FAULT TEST RESULTS Date Performed by Results Location A copy of this form should be retained by the building s electrical foreman...

Page 15: ...ge 0 5 of nominal voltage Current 1 100A direct 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 Gre...

Page 16: ...0 10 98A MULT or 40 140 of CT Primary CUB Current Unbalance Threshold 2 25 or 999 disabled 02 30 J02 J30 TC Overcurrent Trip Class and Linear Overcurrent Trip Delay L00 L60 or oFF RD1 Rapid Cycle Tim...

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