Siemens SAMMS-MV Manual De Usuario

Appendix A Technical Specifications

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Overload classes

Overload classes 2 through 23 with one second increments.

Trip Characteristics

Tripping time at 6 x I = 95% of the overload class (±5%).
Tripping time at 1.5 x I within two minutes for warm conditions for all classes.

Tripping threshold

(1.1 ± 0.05) x I for motors with 1.00 service factor, and
(1.2 ± 0.05) x I for motors with 1.15 service factor.

Tripping time

20 minutes @1.15 x I for motors with service factor 1.

Mechanical jam protection
SAMMS-MVX only

Sudden increase of the motor running current. Pick-up current adjustable from 120 to
400% in increments of 5% of I . Pick-up time 360 msec.
Default values: 200% I .

Loss of load protection
SAMMS-MVX only

Sudden decrease of motor running current. Pick-up current adjustable form 20 to 95% in
increments of 5% of I . Pick-up time 360 msec.
Default values: 50% I .

Process current warning
SAMMS-MVX only

Settings from 0 to 100% of I .

Accuracy

± 5% of overload trip curve values.
± 2% repeat accuracy.

Phase unbalance protection

Response time after 1 second
Shifted trip threshold value to 0.9 x I at 40% phase unbalance.

Equipment ground fault protection

Response time after 1.4 seconds.
Pick-up time: 360 msec.

Pick-up current:
Overload Relay Size Pick-up Current Default
H3A 7A- I 10A
H3B 7A- I 10A
H3C 7A- I 10A
H6 7A- I 20A

Rotor protection

Cold stall time adjustable from 5 to 100 seconds in increments of 1 second. If cold stall
time is not known, default value shall be according to the type of motor used.
Motor Type Cold Stall Time
Open Drip Proof (ODP) 10 Seconds
Totally Enclosed Fan Cooled (EFC) 20 Seconds

Ambient temperature

Motor ambient temperature adjustable 0 - 70°C in increments of 5°C.
Default value: 40°C.

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