OSRAM POWERTRONIC PT-FIT I ECG for HID lamps, with cable clamp - Manual (Page 10)

THE PRODUCT IN OPERATION
2.1.3. Undervoltage > 198 V
The operation of ECGs below the permissible nominal
voltage range ("undervoltage") is not permitted and may
lead to the following effects:
• Lamp operation outside nominal values → Effect on
lamp life
• Uncertain lamp ignition, as ignition is guaranteed only
above 198 V.
• Unstable behavior of lamp, up to and including the lamp
being extinguished
• Overload on the electronic control gear, as the lamp's
own correction mechanisms in low voltages may give
rise to substantially higher operating current.
In extreme cases this may lead to overloading of compo-
nents and to the device failing. The following causes may
lead to undervoltage:
• Imbalances in mains loading
• Incorrect electrical installation
• Unstable supply networks
• Transition resistance at electrical connections
2.1.4. DC voltage
DC-capable ECGs are marked with "0 Hz" in technical
information sheets. At present there are no devices in
the POWERTRONIC
® ECG product range that fulfi ll the
requirements of DC compatibility.
2.1.5. ECG for networks with 120 V/277 V
Electronic control gear units for metal halide lamps are now
being increasingly used in North America (the USA and
Canada). OSRAM SYLVANIA supplies a growing number
of devices that are usable in North American networks with
120V/277 V and 60 Hz mains frequency.
Further information on this topic is available at:
http://www.sylvania.com/en-us/products/ballasts
Note: The HID ECG family is referred to using the ab-
breviation QT xxx MH (for Metal Halide) on the North
American market.
10
2.1.6. Operation on a 3-phase network
Luminaires and groups of luminaires can be operated in
a 3-phase network using a shared N (neutral) conductor.
This graphic shows both the correct (left) and incorrect
(right) wiring and its consequences.
U
N
* > U
N
Theoretical maximum value:
UN* max = UN x √3 (= 400 V AC @ UN = 230 V AC)
In practice:
UN* < 350 V in most cases
(without fully asymmetrical load balancing)
If the shared neutral conductor is interrupted in an ECG
installation in star confi guration while voltage is present,
then ECG luminaires or groups of luminaires may be ex-
posed to unacceptably high voltages (load imbalances)
and the electronic control gear may be destroyed as a result.
The following points should be observed for electronic
control gear used in 3-phase networks.
1. Check whether the mains voltage is within the per-
missible nominal voltage range for the ECG
2. Make absolutely sure that the neutral conductor is
correctly connected to all the ECG fi xtures and that
it is making proper contact.
3. Cables should only be connected or disconnected
when no voltage is present
4. For 3 x 230/240 V supply networks in triangular circuit
arrangements, protection by way of common discon-
nection of the phase conductor will be required
Important:
In new systems, users should not connect to the network
when the insulation resistance is being measured at 500 V
DC since, according to IEC 0100 6 Section 9.3, the test
voltage is also applied between the neutral conductor (N)
and all three external lines (L1, L2, L3). In existing systems
it is suffi cient to conduct an insulation test between the
external conductors (L1, L2, L3) and the protective earth
(PE) without disconnecting from the network. The neutral
conductor (N) and the protective earth (PE) must not be
electrically connected in any way while this is being done.
For the insulation measurement (500 V DC to Earth) the
neutral conductor terminal may only be opened after the
mains voltage has been switched off.
Make sure that the N conductor is correctly connected
before putting the equipment into service.
The neutral conductor should never be interrupted during
the operation of the lighting installation.
Figure 9: 3-phase network
correct faulty
U
N
* > U
N
L1
N
L3
L2
L1
N
L3
L2
U
N
(e.g. 230 V~)
U
phase-Phase
= U
N
x √3
(z.B. 400 V~)