Carlo Gavazzi PTA01, DTA02, PTA02 Data Sheet

Monitoring Relays
Motor temperature
Types DTA01, PTA01, DTA02, PTA02

• Motor temperature monitoring relay

• Measuring ranges: PTC according to EN 44081

• Remote and local alarm reset (DTA02, PTA02)
Output: 8 A SPDT (PTA01/DTA01/DTA02) or SPST

•

DTA01) relay, normally energized

(
For mounting on DIN-rail in accordance with DIN/EN

•
50 022 (DTA01, DTA02) or plug-in module (PTA01,
PTA02)

• 22.5 mm Euronorm housing (DTA01, DTA02) or
36 mm plug-in module (PTA01, PTA02)

• LED indication for relay and power supply ON (DTA02,
PTA02)

TA01, DTA02

D

TA01, PTA02

P

• Galvanically separated power supply

Product Description Ordering Key

DTA01, DTA02, PTA01 and
PTA02 are precise thermis­tor monitoring relays.
They can be used to monitor
the temperature of the coils
of a motor with built-in
PTC’s. The alarm status of
the relay can be reset by

either an external contact or
an internal button (DTA02,
PTA02).
The test button allows the
simulation of the fault condi­tion (DTA02, PTA02).
The red LED indicates the
alarm status.

Housing
Function
Type
Item number
Output
Power supply

DTA 01 C 230

Type Selection

Mounting Output Supply: 24 to 48 VAC/DC Supply: 115 VAC Supply: 230 VAC

DIN-rail SPST DTA 01 CD 48 DTA 01 C 115 DTA 01 C 230
Plug-in SPDT PTA 01 CD 48 PTA 01 C 115 PTA 01 C 230
DIN-rail SPDT DTA 02 CD 48 DTA 02 C 115 DTA 02 C 230
Plug-in SPDT PTA 02 CD 48 PTA 02 C 115 PTA 02 C 230

Input Specifications

erminals T1, T2

A01, DTA02:

Input (PTC)

Measuring ranges

Max cold PTC resistance 1500 Ω
Alarm setpoint 3100 Ω ± 10%
Return setpoint 1650
Short-circuit detection 0 to 10
Measur

Contact input

DTA02 Terminals Z1, Z2
PTA02 Terminals 8, 9
Disabled > 10 k
Enabled < 500 Ω
Alarm reset > 500 ms

DT

PTA01, PTA02: Terminals 5, 6

ement voltage

T

Ω ± 10%

Ω

≤ 2.5V (acc. to IEC 60034-11)

Ω

Output Specifications

Output SPST or SPDT relay

Rated insulation voltage 250 VAC

Contact ratings (AgSnO2)µ

Resistive loads AC 1 8 A @ 250 VAC

Small inductive loads AC 15 2.5 A @ 250 VAC

Mechanical life ≥ 30 x 106operations
Electrical life ≥ 105operations

Operating fr
Dielectric str

Dielectric voltage
Rated impulse withstand volt. 4 kV (1.2/50 µs)

equency

ength

DC 12

DC 13 2.5 A @ 24 VDC

5 A @ 24 VDC

(at 8 A, 250 V, cos ϕ = 1)

≤ 7200 operations/h

≥ 2 kVAC (r

ms)

Specifications are subject to change without notice (04.06.10) 1

DTA01, DTA02, PTA01, PTA02

Supply Specifications

Power supply

Rated operational voltage (IEC 60664, IEC 60038)
through terminals:

A1, A2 (DTA01, DTA02)

, 10 (PTA01, PTA02)

2

Dielectric voltage

upply to input 2 kV 4 kV

S

upply to output 4 kV 4 kV

S
Input to output 4 kV 4 kV

Rated operational power

AC 2.5VA
DC 1.5W

D

115: 115 VAC ± 15%

230: 230 VAC ± 15%

(1.2/50 µs)

Overvoltage cat. III

48: 24 to 48 VAC/DC ± 15%

5 to 65 Hz, insulated

4

45 to 65 Hz, insulated

45 to 65 Hz, insulated

DC supply AC supply

Mode of Operation

DTA01, DTA02, PTA01 and
PTA02 monitor the resis­tance value of the PTC
resistors connected to the
terminals T1 and T2 (or 5
and 6). This value is related
with their temperature (often
the three coils of a motor) so
to offer a prompt reaction to
over temperature.

Example 1 - DTA01 or
PTA01
The relay operates as long
as the measured resistance
is below the rated value. The
relay releases if the mea­sur
temperature of the motor
coils) exceeds the rated val­ue.

esistance (i.e. the

ed r

Example 2 - DTA02 or
PTA02
The relay operates and the
yellow LED is ON as long as
the measured resistance is
below the rated value. The
relay releases and the yellow
LED is OFF if the measured
resistance (i.e. the tempera­ture of the motor coils)
exceeds the rated value.
Provided that the resistance
has dropped below the rat­ed value (i.e. the tempera­ture of the motor coils has
returned cold), the relay
operates when the intercon­nection between ter
Z1, Z2 or 8, 9 is interr
or the reset button on the
front of the unit is pressed.

minals

upted

General Specifications

eaction time

R

larm ON delay < 150 ms

A

Reset delay < 500 ms

Accuracy (15 min warm-up time)

Temperature drift ± 1000 ppm/°C
Repeatability ± 0.5% on full-scale

Indication for

ower supply ON LED, green

P

elay ON LED, yellow

R

Environment (EN 60529)

Degree of protection IP 20
Pollution degree 3 (DTA01, DTA02),

Operating temperature -20 to 60°C, R.H. < 95%
Storage temperature -30 to 80°C, R.H. < 95%

Housing

Dimensions DTA01, DTA02 22.5 x 80 x 99.5 mm

Material PA66 or Noryl

Weight Approx. 150g
Screw terminals

Tightening torque Max. 0.5 Nm

Product standard EN 60255-6
Approvals UL, CSA
CE Marking L.V. Directive 2006/95/EC

EMC

Immunity According to EN 60255-26

Emissions

PTA01, PTA02 36 x 80 x 94 mm

resistance rising from

(

-20% to +20% set value)

(resistance decreasing from
+20% to -20% set value)

2 (PTA01, PTA02)

acc. to IEC 60947

EMC Directive 2004/108/EC

According to EN 61000-6-2

ding to EN 60255-26

Accor

ding to EN 61000-6-3

Accor

Operation Diagrams

A01, PT

DT

Power supply

Relay ON

A01

2 Specifications are subject to change without notice (04.06.10)

DTA02, PTA02

Power supply

Reset contact

Relay ON