Table of Contents
Table of Contents
Related Manuals for ABB SPAM 150 C
Summary of Contents for ABB SPAM 150 C
- Page 1 SPAM 150 C Application examples Technical information...
-
Page 2: Table Of Contents
Time constant versus safe stall time t ..............4 External trip via control input ................... 5 Disabling of restart inhibit for use outside SPAM 150 C ........... 5 Mutual restart inhibit for multimotor applications ............ 5 Note about the contactor versus circuit-breaker drives ..........5 Example 1. -
Page 3: General About The Protective Functions
The thermal overload unit of the relay protects Regardless of which function mode is used, the General about the motor against both short-time and long time external input to the relay can be programmed the protective overloading. The highest permissible continu- to link an external trip inhibit order e.g. -
Page 4: Some Notes And Useful Hints
A core balance transformer is recommended to The unbalance and phase reversal units can be be used in networks with isolated neutral or in separately selected or taken out of use. If e.g. a high resistance earthed networks. The trans- motor is used also with a reversed direction of forming ratio of the core balance transformer rotation, the phase reversal is taken out of serv-... -
Page 5: Increasing The Sensitivity Of The Earth-Fault Protection
The switch is found in submenu position 4 in SPAM 150 C is used in other packages than SPAM 150 C. This the register "A" and is normally = 0 but should might often be necessary as the restart enable sig- bet set = 1 to disable the restart inhibit signal. -
Page 6: Example 1. Protecting A Circuit Breaker Controlled Motor In An Isolated Network
Given data of the squirrel cage motor to be pro- Example 1. tected: Protecting a circuit breaker Rated power P 4500 kW controlled motor Rated voltage U 3300 V in an isolated Rated current I 930 A t 6x network Starting current I 6.2 x I Starting time t... - Page 7 The possibility to use an external trip is also balance c.t. type KOLMA 06 A1, a turns ratio indicated in the block diagram in Fig. 2. By set- of 100 /1 A is recommended. ting switch SGB/5 = 1, the control input is linked to the trip output.
- Page 8 The behaviour of the thermal model under a thermal capacity decreases rapidly to a level de- couple of typical drive conditions is shown in termined by the long term thermal loading of Fig. 3 and 4. Figure 3 shows the thermal behav- the motor.
-
Page 9: Contactor Controlled Direct Started Motor
Data on the motor to be protected: The cooling factor k is set at 4...6 beacuse the Example 2 motor is a normal, totally enclosed unit, cooled Type = squirrel cage motor with direct start, by a fan on the the rotor shaft. Determining totally enclosed with fan cooling suitable setting... - Page 10 Should a unit other than the overload protec- achieved with relay D (contacts 77 - 78) as soon tion or start-up stress monitor of the relay trip, as the thermal level exceeds the set prior alarm level θ the condition of the motor should be checked. .
-
Page 11: Example 3. Protecting A Direct Started Motor With A Low Safe Stall Time
In many applications, e.g. ExE-type drives, the The speed switch information is used to control Example 3 motor is not allowed to be in a stalled condi- the start-up stress monitor and the setting ts is tion as long as its own start-up time. To find set a little shorter than the maximum allowed Protecting a out whether the motor is speeding up or not, a... -
Page 12: Example 4. Protecting Of A Feeder Cable, A Transformer Or Another Non-Rotating Object
The relay SPAM 150 C can also be used as a The start of the high-set overcurrent unit can Example 4 multifunction protection for other objects than be brought out linked to relay D instead of the motors, e.g. feeder cables, resistive elements or motor start-up info. -
Page 13: The Parameter P Of The Thermal Unit
1.5 x I θ I = 0.8 x I θ 1.5 x I θ I = 0.8 x I θ 1.5 x I θ I = 0.8 x I θ Figure 8. The behaviour of the thermal level in a single time constant object with varying load sequencies The parameter p of One of the main settings of the thermal unit is... - Page 14 Figure 10. Protection of a feeder.
-
Page 15: Example 5. How To Use The Start-Up Time Counter
Quite often a motor manufacturer gives a state- The three 20 second starts add up to a total of Example 5 ment of how many times a motor may be re- 60 seconds. Right after the third start has been started within a certain time interval. -
Page 16: Example 6. How To Set The Phase Unbalance And Phase Reversal Unit
In a full broken phase condition, the unbalance reading of SPAM 150 C is 100%. This can be compared to the reading of 57.8% with a relay measuring unbalance on a negative phase se- quence current basis (e.g. -
Page 17: Appendixies
Appendix 1 The complete block diagram for SPAM 150 C with all SGR switches shown SG4/2 SGR2/1 SGR2/2 SGR2/3 SG4/3 SGR1/1 SGR1/2 SGR1/3 SGR1/4 SGR1/5 SGR1/6 SGR1/7 SGR2/4 SGR2/5 SGR2/6 SGR2/7 SGR2/8 SGR1/8... - Page 18 Appendix 2 4000 4000 Trip characteristic diagrams for the 3000 3000 thermal unit 2000 2000 1000 1000 1.05 1.05 θ θ Trip diagram for a cold condition, i.e. with- Trip diagram for a hot condition, i.e. with a out prior load. The cold curve is independ- prior load 1.0 x I and weighting factor p set θ...
- Page 19 4000 4000 3000 3000 2000 2000 1000 1000 t 6x [s] 10 15 20 1.05 1.05 θ θ Trip diagram for a hot condition, i.e. with a Trip diagram for a hot condition, i.e. with a prior load 1.0 x I and weighting factor p set prior load 1.0 x I and weighting factor p set...
- Page 20 Heating up during an overload condition: Thereafter the cooling follows the lower curve Appendix 3 with a time constant equal to the heating time Θ -t/τ = (I / (1.05 x I x (1-e ) x 100% constant as long as the motor is running at nor- θ...
- Page 21 Appendix 4 Reference card for Protected object: Relay type designation: Suojauskohde: Skyddsobjekt: Releen lajim.: Reläets typbet.: the motor protection Code of apparatus: RS-number: relay module SPCJ Kojetunnus: Apparatkod: RS-numero RS-nummer: Date & signature: Serial number: 4D34 _________________________ Pvm. & allek.: Datum & sign.: Sarjanumero: Serienummer: ∆I = Settings:...
- Page 22 Appendix 5 Data needed to determine motor protection settings Motor data enquiry form Motor data System data °C Type or construction of motor.... Ambient temperature t ..............Cooling arrangements & systems: totally enclosed (rib cooling) Rated power P heat exchanger Rated voltage U ............
- Page 24 ABB Oy Substation Automation P.O.Box 699 FIN-65101 VAASA Finland Tel. +358 (0)10 22 11 Fax.+358 (0)10 22 41094 www.abb.com/substationautomation...