CIRCUTOR EMF-EMB User Manual

STATIC SWITCHING MODULES

FOR

POWER FACTOR COMPENSATION

EM. SERIES

(CIRCUTOR Patent Nr. 542258)

INSTRUCTIONS MANUAL

M98116701-20 / 07A

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TABLE OF CONTENTS

1 GENERAL DESCRIPTION _________________________________________________ 2

2 TYPES __________________________________________________________________ 2

2.1 Technical characteristics of EM modules: __________________________________________ 3

3 EMF and EMB MOUNTING INSTRUCTIONS _________________________________ 4

4 WIRING INSTRUCTIONS FOR EQUIPMENT BASED ON MODULES EM. _________ 5

5 BLOCK DESCRIPTION OF EM MODULES.___________________________________ 6

5.1 Static Power Block (BPE) _______________________________________________________ 6

5.2 Zero Switching Control Board (CPC). _____________________________________________ 7

6 START UP OF PF COMPENSATORS BASED ON EM MODULES. ______________ 7

6.1 Initial checking (before connecting to supply) _______________________________________ 7

6.2 Checking immediately after the supply connection ___________________________________ 8

7 TROUBLE SHOOTING ____________________________________________________ 8

8 MAINTENANCE. _________________________________________________________ 9

9 TECHNICAL SERVICE AND WARRANTY ___________________________________ 9

10 BASIC WIRE DIAGRAM OF AN EM MODULE_______________________________ 10

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1 GENERAL DESCRIPTION

The EM series of static switching modules are the basic blocks used to build static capacitor
banks for power factor (PF) compensation. These static switched capacitor banks use thyristors
instead of electromechanical switchgears to connect and disconnect the capacitors. The static
system is the most convenient in case of large and fast fluctuations of the load current (load
changes lasting a few milliseconds to several seconds). The advantages of the static system are
the connection at zero voltage and the disconnection at zero current, thus avoiding transients. The
ON-OFF switching speed can be as high as 1 operation every 20 ms

Each EM module is used to switch ON and OFF a capacitor step. Notice that a fast power factor
controller like the COMPUTER...f must be used to regulate the power factor using a static
switched capacitor bank . The standard PF regulators aren't fast enough to compensate the fast
load fluctuations.

2 TYPES

The range of static switching modules consists of four main groups :

•

Three phase with fuses , designated as EMF-xx-xxx

•

Three phase without fuses , designated as EMB xx-xxx

Note: The symbol “x" means a reference number or character which depends on the type.

There are different types depending on the operating voltage and the power of capacitor they are
able to operate (see tables 1 to 4)

In the following paragraphs we designate generically as EM modules when we refer to general
or common characteristics valid for all the types.

TABLE 1.- Three phase EMF modules (Built in fuses)

CODE OPERATING

VOLTAGE

TYPE POWER

(kvar)

LOSSES

(W)
R41133 380-400V EMF-40/400 40 115
R41136 380-400V EMF-60/400 60 175
R41137 380-400V EMF-80/400 80 230
R41111 220-240 V EMF-25/230 25 125
R41112 220-240 V EMF-37,5/230 37,5 190
R41114 220-240 V EMF-45/230 45 225

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EXTERNAL

TABLE 2.- Three phase EMB modules

(External fuses must be included)

CODE OPERATING

VOLTAGE
R41233 380-400V EMB-40/400 40 80 A gl
R41236 380-400V EMB-60/400 60 125 A gl
R41237 380-400V EMB-80/400 80 160 A gl
R41211 220-240 V EMB-25/230 25 80 A gl
R41212 220-240 V EMB-37,5/230
R41214 220-240 V EMB-45/230 45 160 A gl

Note: Losses are approx. the same as modules EMF of equal size.

2.1 Technical characteristics of EM modules:

Standard supply voltage (power block)

Frequency
Rated power of C step
Overload capability.

Protections
Fuses
dV/dt
Thermostat
di/dt

Max. ambient temperature
Max. heatsink temperature
Protection degree
Dimensions
Mounting distances
Weight

Control of the static switch:
Auxiliary supply at terminals B1-B2

Control method

V
I

A-C

open circuit

A-C

closed circuit

TYPE POWER

(kvar)

37,5 125 A gl

400 Vac / 230 Vac (other values up to 690
Vac , on request)
50 / 60 Hz (either)
see table of types
1,5 Inom during 1 minute

NH type (size according to rated current)
RC protection at 1000 V/µs
90 ºC (Opens ENABLE circuit A-C)
100 A/µs ( L= 12µH , not included , must be
mounted in series with the Capacitor)
40 ºC
80 ºC
IP00
See figure 1

10,5 kg.

400 Vac / 230 Vac (Shown in the label)

Potential free contact between terminals A
and C
(see table 5)
20 V cc
Max. 7 mA

TYPE

FUSES