TECHNICAL DATA
Foxwood Close
Foxwood Industrial Park
Sheepbridge
Chesterfield
Derbyshire
S41 9RB
United Kingdom
T: 01246 261 828
F: 01246 261 830
sales@par.gb.com
www.par.gb.com
Page 1 of 3
EMC TYPE ERA ELECTRONIC MOTOR START CAPACITOR RELAY
DESCRIPTION
The EMC Type ERA Electronic Start Capacitor Relay controls the motor
and start capacitor by means of an electronic adjustable time switch.
The start capacitor is switched off after an adjustable time delay.
The time delay corresponds to the time required for the motor to
achieve nominal rotary speed after start up.
APPLICATION
The relay is particularly suitable for applications demanding frequent switching, including:
 Single phase motors
 Three phase motors at single phase
ADVANTAGES
 Highly reliable component
 Electronic function - wear-free non moving parts
 Compact construction for mounting inside the motor terminal box
 Easier to install and adjust than centrifugal switches
 Optimum setting of motor torque by means of an adjustable switch off time of the start capacitor
 Complete suppression of sparking during switching (unlike mechanical switches)
 High tripping currents in one compact device
TECHNICAL DATA
Operational voltage
Switching current IB
Time delay until start capacitor switches off
Operating temperature of device
Ambient temperature
Storage temperature
Time delay to reclosing of the start capacitor:
Type ERA
Type ERA-nd
230V or 115V 
10%
Warning - The operational liability cannot be guaranteed
with a permanent overvoltage of +10% and a maximum
ambient temperature at the same time.
24A max, ambient temperature +80oC max
0.25 - 5 seconds 10%
Adjustable supply voltages above the rated voltage and
ambient temperatures above the rated temperature
reduce these times.
Supply voltages below the rated voltage increase
the times.
o
0 to +70 C
Maximum +80 oC
- 40 to +85 oC
60 seconds approx.
< 50 micro-seconds
Statements, technical information and recommendations contained herein are based on tests we believe to be reliable but they are not to be construed in
any manner as warranties expressed or implied. The user shall determine the suitability of the product for their intended use and the user assumes all risk
and liability whatsoever in connection therewith.
TECHNICAL DATA
Page 2 of 3
EMC TYPE ERA ELECTRONIC MOTOR START CAPACITOR RELAY
LEAD PATTERN
SCEMATIC DIAGRAM & MEASUREMENT OF SWITCHING CURRENT IB
L1, N:
U1, U2, Z1, Z2:
CB:
CA:
IB :
Operating voltage
Motor windings
Operating capacitor
Start capacitor
Switching current
MECHANICAL DATA - HOUSING
Material (Din designation)
Continuous rated temperature
Short-term temperature
Melting temperature (DIN 53 736)
Dynamic glass transition temperature (DIN 53 736)
Dimensional stability under heat to ISO-R 75, procedure B (DIN 63 461)
o
Coefficient of thermal conductivity @ 23 C
o
Specific heat capacity @ 23 C
Coefficient of linear thermal expansion @ 23o C
Blue plastic PA 66
o
100 C
o
170 C
o
255 C
o
5/50 C
o
> 200 C
0.23 [W/(K*m)]
1.7 [J/(g*K)]
7 (10-5 *1/K)
TECHNICAL DATA
EMC TYPE ERA ELECTRONIC MOTOR START CAPACITOR RELAY
Page 3 of 3
DRAWING
SCEMATIC CIRCUIT: EMC TYPE ERA ELECTONIC START CAPACITOR RELAY IN MOTOR TERMINAL BOX