Motor Protection Relay, Relay Testing, Relay Servicing, Mumbai, India
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RELAY TEST REPORT

   
  MOTOR PROTECTION RELAY
 
Name of Client :   Report 14
Location      
Feeder 5F6 / 50 HP / Cooling Tower    
   
  1. Relay Details :
   
 
Make Type Rating (In) Relay Sr. No. Aux Supply
L&T MM 30 5 Amp 4083/07/9/098 230 V AC
   
  2. Settings :
   
 
Sr. No. Display Description Setting Range Adp. Setting
1 Fin Main Frequency 50-60 hz 50
2 In Rated Primary Current 1-9999 Ap 100 Ap
3 On Rated Primary Current E/F 1-9999 Ap 100 Ap
4 Im Motor full load current 0.1-1.5 In 0.7 In
5 Ist Motor start up current 0.5-10 Im 7 Im
6 tst Motor starting time 0.5-10 Im 6 s
7 Itr Switch over current of motor starter Dis-0.1-1 Ist 0.5 Ist
8 tTr Max switch over time for start up 0.5-50 S 5 s
9 tm Thermal time constant; 1-60 Min 60 min
10 t0/tm Steady/ running motor thermal time constant 1-10 3
11 Ta/n Pre alarm motor heating level 50-110% 90 %
12 Ts/n Motor restart heating level 40-100% 100 %
13 Ib Rated max continuous current of the motor 1.00-1.30 Im 1.05 Im
14 St No Max no of start Dis 1-60 6
15 tst No Time StNo is counted 1-60 M 60 M
16 tBSt Restart inhabitation time 1-60- Rm m 20 M
17 ILR Trip level of lock rotor function Dis 1-5 Im 2 Im
18 tLR Trip time delay LR 1-120 S 1 s
19 Is> Trip level of inverse time current unbalance Dis 0.1-0.8Im 0.3 Im
20 tIs> Trip time delay of inverse time current unbalance 1-8 sec 4 s
21 I< Trip level of undercurrent (no load) Dis -0.15-1 Im 0.2 Im
22 tI< Trip time level of undercurrent 0.1-90S 3 s
23 I> Trip level of phase overcurrent Dis-1-5-Ist 2 Ist
24 tI> Trip time delay of phase overcurrent 0.05-1S 0.1 s
25 O> Trip level of E/F element Dis- 0.02-2 On 0.10 On
26 to> Trip time delay of E/F element 0.05-5S 0.2 s
27 tBO Reset time delay of the blocking output relay 0.05-0.5 S 0.15 s
29 RTD Thermal probe On-Off Off
29 SpC Speed switch On-Off Off
30 Tsyn Clock synchronization time Dis-M Dis
31 Tcs Trip circuit supervision On-Off Off
   
  3. Element checking
  3.1 E/F checking
   
 
Phase Set Amps Set Time P/U Amps Op Time (sec) Indication
E/F 0.5 A 0.2 Sec 0.50 A 0.202 Glow
E/F 0.5 A 0.3 Sec 0.50 A 0.307 Glow
   
  3.2 Over current relay :
   
 
Phase Set Amps Set Time Op Time (sec) Indication
R/Y/B 2 Ist 0.1 Sec 0.108 Glow
R/Y/B 2 Ist 0.5 Sec 0.504 Glow
R/Y/B 2 Ist 1.0 Sec 1.042 Glow
   
  3.3 No load running :
   
 
Phase Set Amps Set Time Op Time (sec) Indication
R/Y/B 0.2 Im 3 Sec 3.05 Glow
R/Y/B 0.2 Im 2 Sec 2.03 Glow
R/Y/B 0.2 Im 1 Sec 1.05 Glow
   
  3.4 Current Unbalance (negative) :
   
 
Phase Set Amps Set Time Op Time (sec) Indication
R/Y/B 0.3 Im 4 Sec 4.03 Glow
R/Y/B 0.3 Im 6 Sec 6.05 Glow
R/Y/B 0.3 Im 2 Sec 2.02 Glow
   
  3.5 Lock Rotor :
   
 
Phase Set Amps Set Time Op Time (sec) Indication
R/Y/B 2 Im 1 Sec 1.05 Glow
R/Y/B 2 Im 4 Sec 4.03 Glow
R/Y/B 2 Im 6 Sec 6.03 Glow
   
  4. Remark:
   
  Tripping scheme wiring found wrong at Relay terminal. Same has been identified & proper connections are made for correct utilization of NO/NC contact of Relay.
   
 
RELAY TESTING ON SITE RELAY TESTING ON SITE
RELAY TESTING ON SITE RELAY TESTING ON SITE
   
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