REMAK a.s., Zuberská 2601, 756 61 Rožnov p. R., tel.: 00420 571 877 778, fax: 00420 571 877 777, e-mail:
[email protected], URL: http://www
.remak.eu
INSTALLATION AND OPERATING INSTRUCTIONS
11/2011
STE Motor Protecting Relays
Basic data
(1 STE relays are not used with RF fans 30/… or any RO fans which
are equipped with their own integrated thermal protection (serial
thermo-contact).
(2 STE relays are not used if the protection and switching are
properly ensured by the control unit or TRE controller.
Note: Comprehensive protection of power controlled drives and frequently switched
drives can only be ensured by direct monitoring of the motor winding tempera-
ture using thermo-contacts or thermistors. Common protection of motors (using
magnetic and thermal triggers) is not able to check the actual motor temperature,
which can result in motor failure.
Application
STE protecting relays are intended to start up, switch
off and protect single-phase motors of RP, RPH, RQ
and RF (1 fans unless the protection is ensured by other
approved means (2.
Operating Conditions and Position
STE protecting relays are designed for indoor as well as
outdoor application in chemical-free environments wit-
hout explosion hazard. The STE relay's plastic box can
be mounted on the wall or partially embedded (30 mm)
in plaster. The STE relay can also be installed without
the plastic box directly on the DIN bar inside the distri-
bution board (module width 3.75, IP 20).
Functions and Operation
Basic features, properties and mode of operation are
described in the following articles:
Fan Control
Press the (I) button to switch the fan on, press the (0)
button to switch the fan off.
Comprehensive Fan Protection
If the fan fails, the STE protecting relay will automatica-
lly switch it off. The switching-off signal is provided by
opening of the TK thermo-contact in the motor winding.
Once the failure has been removed, the fan can be
restarted using the (I) button. If the power supply fails
(STE stays closed), the fan will be automatically started
once the power supply has been resumed.
Power Supply Line Protection
The power supply line is protected by the short-circuit
relay and over-current relay.
Auxiliary Contacts
This relay is equipped with a pair of auxiliary contacts(1
circuit-opening contact and 1 circuit-closing contact)
which can be used for remote signalling of the device
status, respectively for other working signals.
Wiring
Installation, adjustment, maintenance and replacement
of the STE relay may only be performed by a qualied
person authorized in accordance with ČÚBP Regulation
No. 50/78 Sb. § 6.
Each installation of the relay must be performed on
the basis of a project.
Before putting the relay into operation, a wiring
inspection and prescribed procedures must be perfor-
med.
Basic technical data
Full type designation.........................................STE T10B
Rated voltage ........................ 1 x 230 V, 50 Hz + N + PE
Operating voltage ......................................... 60 až 250 V
Maximum motor current............................................. 10 A
Minimum motor current............................................. 0,4 A
Auxiliary contacts (AC15) .............230 V / 4 A (24 V / 6 A)
Max. pre-protection................................................... 16 A
Protection Class ............................................... II IEC 536
Degree of protection..................................................IP54
Permissible ambient temperature.............. -25 až +40 °C
Dimensions (W x H x D) .......................70 x 141 x 92 mm
Weight .................................................................... 0,6 kg
Conductor cross-section.............................. max. 10 mm2
Conductor cross-section for TK and aux. contacts
..... max. 2,5 mm2
Fig. 1
Fig. 2
ste_mon.pm6 2.3.2004, 8:311
Single-phase
fan motor
STE
protecting relay
Auxiliary
contacts
