Metz Eta Plus ELC N6 Guide

UV-
TECHNOLOGY
Technical Documentation
ELC®N6 / ELC®N8 / ELC®N10
GB
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Geschäftsführer: Dr. Peter Schwarz-Kiene
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eta plus electronic gmbh
Lauterstraße 29, 72622 Nürtingen, Telefon [phone], Fax [phone], E-mail: [e-mail], www.eta-uv.de
Eingetragen unter HRB 724321 AG Stuttgart, USt.-Id.-Nr. DE 146267800, Geschäftsleitung: Uwe Uhlemann, Dr. Markus Roth

ELC N6_N10-V3.1-09/11-GB subject to technical alterations
ELC®(„Electronic Lamp Control“) is a registered trademark of
IST Metz GmbH.

Contents page I
ELC N6_N10-V3.1-09/11-GB subject to technical alterations
Contents
1 Safety ................................................................................................. 1
1.1 Definition of Symbols.................................................................................1
1.2 Safety Advice ..............................................................................................1
1.3 Correct operation........................................................................................2
1.4 Extended use ..............................................................................................2
2 Description of functions................................................................... 3
3 Installation......................................................................................... 4
3.1 Mounting of casing.....................................................................................4
3.1.1 Back mounting ................................................................................................5
3.1.2 Side by side rack mounting.............................................................................6
3.2 Connection ..................................................................................................8
3.3 Control current connections....................................................................12
3.4 Explanations of the control functions for ELC.......................................14
3.4.1 Release relay................................................................................................14
3.4.2 Control input START.....................................................................................14
3.4.3 Setting lamp power .......................................................................................14
3.4.4 Table: lamp power ........................................................................................15
3.4.5 Earth fault control.......................................................................................... 16
4 Operation of ELC ............................................................................ 17
4.1 Initial operation .........................................................................................17
4.2 Switching on the ELC ...............................................................................17
4.3 Switching on the lamp..............................................................................17
4.4 Dimming Operation...................................................................................18
4.5 Standby Operation....................................................................................18
4.6 Switching off the Lamp ............................................................................18
5 Troubleshooting.............................................................................. 19
5.1 Repair ELC ................................................................................................19
6 Technical Data................................................................................. 20

1 Safety page 1
ELC N6_N10-V3.1-09/11-GB subject to technical alterations
1 Safety
1.1 Definition of Symbols
Stop (Stop Danger). This symbol warns of serious danger of severe injury to
persons. It must be strictly observed.
Attention (Warning). This symbol indicates information the non-observance of
which can lead to extensive damage to property. The safety warning must be
strictly observed.

Information. This symbol indicates key information on use. Non-observance can
lead to failure.
1.2 Safety Advice
The ELC must be installed and connected in compliance with existing
regulations and practices. This is e.g. EN 60204-1 in Europe.
Repairs on the ELC may only be carried out by the manufacturer.
The installation and starting up may only be carried out by skilled electricians.
Do not open the ELC before it is disconnected from the mains. BEWARE OF
RESIDUAL VOLTAGE! The unit may still be live up to three minutes after it has
been switched off.

1 Safety page 2
ELC N6_N10-V3.1-09/11-GB subject to technical alterations
The ELC causes a leakage current greater than 3.5 mA!
Safeguarding by means of leakage current protection type A and type AC
according to IEC 60755 is not permitted!
The ELC operates in principle as a frequency converter and is equipped with a
mains filter whose leakage current could activate fuse protection.
Contact to the grounding connector must always be ensured.
Additional measures must be taken to ensure that there is no danger when
touching the appliance. This could be by means of a universal leakage current
protection type B, taking into consideration the increased response threshold, or
by means of an independent equipotential connection
1.3 Correct operation
The ELC is an electrical unit intended to be installed in the switch cabinets of
industrial high-voltage power installations. It is conceived as an electronic ballast
for the operation of lamps intended for this purpose.
Any other use is deemed as misuse. The manufacturer will not assume liability
for damage resulting from misuse.
A pre-requisite for authorised operation of the ELC is the observance of both the
operating and maintenance instructions and the safety advice.
1.4 Extended use
Extended use beyond the operating specifications as stated is not permitted.
The manufacturer will not assume liability if the equipment is used in any other
way. The operator acts at his own risk.
Any operation beyond the scope of the authorised operation is considered to be
misuse.

2 Description of functions page 3
ELC N6_N10-V3.1-09/11-GB subject to technical alterations
2 Description of functions
The electronic ballast ELC is designed to operate medium pressure discharge lamps as
described in chapter 6.
In contrast to conventional ballasts (inductive lamp ballast or transformer or transformer with
transductor), the lamp with an electronic ballast is operated with high frequency (approx.
100 kHz). The lamp does not flicker and dimming is infinitely adjustable to a range between
20 % and 100 % of the electric power or to between 15 % and 100 % of the UV radiation
respectively.
Dimming
The possibility of dimming the lamp has two advantages. Firstly the lamp can be switched to
minimum load (standby operation) during longer idle times and energy can thus be saved.
Secondly the optimum lamp power can be determined and adjusted as appropriate.
Power control
The ELC offers a high level of lamp power constancy due to its integrated power control.
Variations in operating voltage of ±10 % do not affect lamp power.
Ignition device
When the lamp is switched on the ELC initiates trigger pulses to fire the lamp; a separate
ignition device is not required.
Other performance characteristics
•High level of electrical efficiency.
•The ELC has a network power factor of > 0.9. It can be operated directly at the network
without compensation.
•The potential-free control inputs allow various lamp conditions such as maximum lamp
power, dimming or standby to be set.
•The digital control inputs are designed for control voltages of between 10 and 30 V AC or
DC. Therefore ELC can be easily integrated into the installation’s electric system.
•Lamp current and lamp power are continuously recorded and output as analogous
0-10 V signals.
•The ELC monitors the lamp cables for earth fault.
•The potential of both lamp outputs is separated from that of the supply voltage.
•The ELC is both short-circuit proof and safe in open circuit operation at the lamp output.

3 Installation page 4
ELC N6_N10-V3.1-09/11-GB subject to technical alterations
3 Installation
3.1 Mounting of casing
The ELC must be installed in a control cabinet with at least IP 54 protection (see
EN 60529). Operation without a control cabinet or in a control cabinet with a
lower degree of protection is not permitted.
The ELC may only be installed vertically (control connections at the bottom,
power connection at the top) allowing for at least the minimum spacing as
shown. No other positioning is possible.
The installation possibilities are shown in 3.1.1 and in 3.1.2.
The ELC should not be mounted in the immediate proximity of sensitive
electronic equipment. An appropriate distance must be maintained to scatter
field transformers or other inductors.
The flow of cool air in ELC must be safeguarded. The ambient temperature must
not exceed the values described in chapter 6!.
The switching cabinet has to be air conditioned in consideration of total electrical
losses and maximum ambient temperature.
If the air conditioning is realised by fans the minimum required air flow is
described in chapter 6. The better the cooling situation the higher the expected
lifetime.
Impure cooling air could affect the functionality of the ELC. This can be avoided
by installing a fine air filter.

3 Installation page 5
ELC N6_N10-V3.1-09/11-GB subject to technical alterations
3.1.1 Back mounting
319 mm
130 mm
min. 20
min. 20
min. 20
min. 50
500 mm
270 mm
23 mm 23 mm
473 mm
min. 100 min. 100
90 mm
Top
Assembly for instance by gudgeon M6 with distance sleeve
pin-and-socket connector
for control signals
Lamp feeder cable
mains connection
Fig. 1: Assembly of the ELC (all dimensions in mm).

3 Installation page 6
ELC N6_N10-V3.1-09/11-GB subject to technical alterations
3.1.2 Side by side rack mounting
321 mm
130 mm
min. 20
min. 50
473 mm
min. 100
min. 100
520 mm
539 mm
80 mm
23 mm
M8 (4x)
Top
pin-and-socket connector
for control signals
Lamp feeder connection
mains connection
Fig. 2 side by side rack mounting with assembly brackets

3 Installation page 7
ELC N6_N10-V3.1-09/11-GB subject to technical alterations
If “side-by-side rack mounting“ is preferred, assembly brackets and screws can be provided
upon request.
Attach bracket to the upper surface of the
appliance
Attach bracket to the underside of the appliance

3 Installation page 8
ELC N6_N10-V3.1-09/11-GB subject to technical alterations
3.2 Connection
earthed lead network side
automatic cutout
earthed lead for the earthing
of lamp assembly
cable shield
lamp feeder cable
lamp assembly
L3
out1
L1 L2
L1
L2
L3
N
PE
out2
Fig. 3: Power connection
The power connections of the
ELC are situated on top of the
casing.
Fig. 3 shows the electrical
wiring plan.
The lamp feeder cable
shielding must be connected to
the ELC. To this end the
connector has an EMC screw
connection (also see:
connection lamp cable).
If wished, the shielding can also
be connected to the lamp unit.
The connection of mains supply cables and lamp feeder cables must be
separated from control cables.
Quality standards according to EN 50160 regarding mains frequency, voltage
drops, transients etc. are required.
The one-phase short-circuit power at the supply point must be 20 times higher
than the nominal power of the UV-installation (accordingly the short circuit
current has to be 35 times higher than nominal current, alternatively the relative
short-circuit voltage has to be 2.8% lower).

3 Installation page 9
ELC N6_N10-V3.1-09/11-GB subject to technical alterations
Mains connection
Fig. 4: Mains supply
The mains connection of the ELC is
situated at the top right.
The cross section of the earthed wire
must be at least 4 mm².
The three phases must be provided with
an automatic cut-out.

In order to avoid damaging the terminal pins, please do not exceed the
following torque:
•L1, L2, L3: 0,6 – 0,8 Nm
•Grounding conductor: 3,0 – 4,0 Nm

3 Installation page 10
ELC N6_N10-V3.1-09/11-GB subject to technical alterations
Connecting the lamp feeder cable

The lamp feeder cable must correspond with the cable parameters described in
chapter Technical Data.
Connector assembly (from left to right)
•Carrier casing
•Casing gasket
•Hood and screws
•EMC cable gland with plastic insert
Preparing the lamp feeder cable:
•Remove sheath
•Free metal braid and put over cable sheath
•Insulate conductor
•Ferrule the grounding conductor (if applied)
8
60 12
(measurements in mm)
•Insert cable into the cable gland and bush
casing

3 Installation page 11
ELC N6_N10-V3.1-09/11-GB subject to technical alterations
•Do not twist wires additionally
•Insert wires into the contact chamber so that the insulation is aligned with the tightening
nut.
•When tightening the nut hold the wire in position.
Torque: 1Nm (permissible moment für screw
driver =1.2 Nm)
Hexagon socket (jaw span 2)
•Connect grounding conductor (if applied)
•Screw on hood. Recommended orientation:
Cable gland in the direction of PIN1 (see
picture below)
•Ensure that the shield evenly covers the
plastic inset of the cable gland (360°
contact)

3 Installation page 12
ELC N6_N10-V3.1-09/11-GB subject to technical alterations
•Tighten EMC cable gland
The lamp feeder cable between the switch cabinet and lamp assembly must be laid in a
metal insulating tube. For the correct installation of the lamp assembly and lamp please
observe the corresponding manufacturer’s instructions.
3.3 Control current connections
The control wires are connected to the underside of the casing by means of the connectors.
On the underside there are two plug
strips (s.Fig. 5).
The pin connector is to be connected to
the plug strip marked Control.
The pin assignment is shown in Fig. 6
and Chart 1.
All control circuits must be earthed
upon installation.
Fig. 5: Control connections
Pin assignment
Start1
Start2
Max1 Min1 + 10 V DC 0-10V P-lamp I-lamp ES1 n.c.
Max2 Min2 GND GND GND GND ES2 OK2
START SET VALUEMAX MIN
n.c.
OK1
PL IL RELEASE
12345678910
20 19 18 17 16 15 14 13 12 11
ES
Fig. 6 Pin plug for control of ELC

3 Installation page 13
ELC N6_N10-V3.1-09/11-GB subject to technical alterations
Designation Pin No. Description
Start1 1
Start2 20
digital control input
START
15 - 30 V AC / DC, between Pin 1 and Pin 20
input impedance = 1 kΩ
potential-free, active high
Max1 2
Max2 19
digital control input
MAX
15 - 30 V AC / DC, between Pin 2 and Pin 19
input impedance = 1 kΩ
potential-free, active high
Min1 3
Min2 18
digital control input
MIN
15 - 30 V AC / DC, between Pin 3 and Pin 18
input impedance = 1 kΩ
potential-free, active high
+ 10 V DC 4 control voltage for set value potentiometer 5 kΩor 10 kΩ
max. 10 mA
0-10V 5 set voltage between 0 –10 V and GND,
input impedance > 200 kΩ
GND 16, 17
analogous control input
SET VALUE *
control GND**
P-Lamp 6 analogous output 0-10 V DC / 1 mA, (1 V ≅1 kW), Reference: GND
GND 15
PL (lamp output) control GND**
I-Lamp 7 analogous output 0-10 V DC / 1 mA, (1 V ≅2 A), Reference: GND
GND 14
IL (lamp current) control GND**
ES1 8
ES2 13
Relay earth contact ES
contact, potential-free
up to 30 V AC / DC, max. 0,5 A
Contact between Pin 8 and 13, closed in
operation, opens in the case of fault
OK1 10
OK2 11
RELEASE relay
contact, potential-free
up to 30 V AC / DC, max. 0,5 A
Contact between Pin 10 and 11, closed in
operation, opens in the case of fault
Chart 1: Control current connection of ELC
* PWM coupling upon request
** control GND: all pins designated control GND are internally connected and potential-free.

3 Installation page 14
ELC N6_N10-V3.1-09/11-GB subject to technical alterations
3.4 Explanations of the control functions for ELC
3.4.1 Release relay
The release relay indicates the trouble-free operation of the unit.
This means that the relay closes when the ELC (see 4.2) is switched on and remains closed
during operation providing there is no defect.
A typical defect would be that the lamp does not fire.
3.4.2 Control input START
High: lamp is on
Low: lamp is off
By applying the High signal the lamp is fired and warms up at maximum current until the
desired power is achieved (see below).
We recommend warm-up at maximum power. After a short time (approx. 2 mins) the full
output has been reached and the lamp power can be varied as desired.
3.4.3 Setting lamp power
Stepless (infinitely variable)
The lamp can be dimmed steplessly from between approx. 20 % to 100 % of the nominal
power. The lamp power is set by applying an analog voltage of between 0 V and 10 V to
control input SET VALUE.
•0 V corresponds to min. power Pmin (20 % of nominal value)
•10 V corresponds to max. power Pmax (100 % of nominal value)
SET VALUE can be controlled manually by means of an external potentiometre.
20 %
Lampenleistung
Lamp power
Set value
100%
0 V 10 V
Fig. 7: Control characteristic

3 Installation page 15
ELC N6_N10-V3.1-09/11-GB subject to technical alterations
Digital: MIN und MAX
For certain operation modes the lamp power can be set to Maximum or Minimum
independent of the control voltage at SET VALUE. E.g.:
•Lamp warm-up: maximum power or
•Standby operation: minimum power
To this purpose the control inputs MAX and MIN respectively are set to High, whereby the
function MAX has the higher priority.
3.4.4 Table: lamp power
SET VALUE MIN MAX Lamp power
0 – 10 V LOW LOW stepless
Minimum – Maximum
0 – 10 V HIGH LOW Minimum
0 – 10 V LOW HIGH Maximum
0 – 10 V HIGH HIGH Maximum

3 Installation page 16
ELC N6_N10-V3.1-09/11-GB subject to technical alterations
3.4.5 Earth fault control
The ELC (electronic ballast) has been fitted with an earth fault control system.
The ELC is fitted with an earth fault relay ES for the purpose of indicating an earth fault.
During trouble-free operation the relay is closed (provided the ELC is connected to the power
supply voltage).
The earth fault control is also active when the lamp is switched off.
The lamp should not be switched on is the relay ES is open.
Lamp
R_error
ES
Control
813
Fig. 8: Earth Fault Control
In the case of an earth fault via the isolating resistor
R_error (see Fig. 8) the relay ES opens .
The error is only displayed, the ELC does not switch
off the lamp. The error is also not stored by the ELC.
In order for the earth fault control to function properly
it is essential that it be connected as prescribed,
particularly the earth connectors.
The relay contact ES (pins 8 and 13 on the control
connector) opens when the isolation resistance
R_error drops below approx. 200 kOhm.
If an earth fault occurs during lamp operation we recommend shutting down the
installation rapidly and correcting the error. The lamp must not be started if
earth fault has occurred.

In order to avoid an unwanted reaction of the earth fault control during faultless
operation, the isolation resistance of the lamp cables and all lamp connectors
must be greater than 10 Mohm.

If the release relay RELEASE (s. 3.4.1) is open the earth fault relay ES will not
give clear information! In this case an error message “earth fault“ should not be
issued.

4 Operation of ELC page 17
ELC N6_N10-V3.1-09/11-GB subject to technical alterations
4 Operation of ELC
4.1 Initial operation
The operative parameters of the ELC, such as the scope of the trigger pulse when switching
on the lamp, is set by the manufacturer.
Alterations to the manufacturer’s settings can only be carried out by the
manufacturer. Adjustment to the internal potentiometer can cause malfunction
and damage to the equipment and is therefore prohibited.
You always have to ensure that the correct lamp type is used (see chapter 6) and that all
wireing is properly connected !
4.2 Switching on the ELC
•The ELC is switched on by applying the operating voltage.
4.3 Switching on the lamp
•A HIGH signal is applied to the digital START control input to switch on the lamp.

If a HIGH signal has already been given to the digital START control input before
the ELC is switched on, then the lamp will not start up. In the case of a power
failure, the ELC cannot automatically switch on the lamp when power returns.
Before switching on the lamp, a LOW signal must be applied to the digital control
input.
Turn the ELC on maximum lamp power during the lamp warm-up period.
Maximum lamp power can be adjusted as follows:
•HIGH signal at the digital MAX control input or
•10 V control voltage at the analogous SET VALUE control input.
During warm-up the lamp power stays at a very low level over a longer period of time and
after approximately 60 seconds rapidly increases to its nominal power. The lamp is operated
with increased power until the nominal power is reached.