Technical Information

Thermal overload unit
Setting of full load current I_q		see ordering information
Resolution of full load setting		2 %
Setting of maximum stall time at 6 times l_n, t₆x		2...30 s
Cooling time constant at zero current (standstill)		4 x heating time constant
Undercurrent unit
Operating value		12...55 % of I_q
Operating time		10 s
Resetting time		1 s
Phase unbalance unit
Basic sensitivity, fully stabilized to phase current levels
between I_n and 4 x l_n, typical value		30 %
Operating time at pickup level		30 s
Operating time at full unbalance		6 s
Resetting time		1 s
Earth fault unit ¹⁾
Zero-sequence / residual²⁾current setting I₀		0.2...0.6 x l_0n
Operating time		1 s
Resetting time		0.2 s
Auxiliary power supply U_aux
Supply voltage on standard relay	SPEM_B_	220...240 V AC
(operation range 0.85 x U _min ...1.10 x U _max)	SPEM_C_	110...120 V AC
Power consumption		3 VA
Output contact ratings
Rated voltage, make and break		230 V AC
Make and carry for 1 s		30 A
Continuous load		5:00 AM
Breaking capacity		5 A AC
Environmental conditions
Specified ambient service temperature		- 10° ...+ 55° C
Transport and storage temperature range		- 40° ...+ 70° C


1) In types SPEM 40_ and SPEM 50_.
2) Rated residual current in types SPEM 50_ is 1 A (with continuous withstand capability 2A and thermal withstand for 1 second 40 A).

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