OSRAM POWERTRONIC PT-FIT I ECG for HID lamps, with cable clamp - Manual (Page 12)

THE PRODUCT IN OPERATION
2.2.2.3. Insulation resistance in lighting installations
The insulation resistance in lighting installation (> 1.0 MΩ)
must be measured in accordance with IEC 60364-6
Section 61.3.3 between:
• The outside cables (L1, L2, L3) and the protective earth (PE)
• The neutral cable (N) and the protective earth (PE)
In spaces with a higher threat of fi re the insulation resis-
tance should also be measured between:
• The outside cables (L1, L2, L3) in relation to each other
• The outside cables (L1, L2, L3) and the neutral cable (N)
The insulation testing should be done at 500 V DC.
Insulation measurement between N/L and PE
The tests should be made both in new and in existing sys-
tems. The test intervals for existing systems should be set out
in the relevant workplace or operational safety regulations.
Insulation measurements should be made without the user
disconnecting any connection. The neutral conductor (N)
and the protective earth must not be electrically connec-
ted in any way. For the insulation measurement (500 V DC
to PE) the neutral conductor terminal may only be opened
after the mains voltage has been switched off. It is essen-
tial that the connection is reestablished securely before
switching the mains voltage back on. Otherwise, load
imbalance and the consequent surge voltage may lead
to the destruction of all ECGs in the system.
Permissible: 500 V = max. 1 mA measured current
Testing procedure:
The ECG fi rst appears to show low impedance (due to
loading of the capacitors in the interference suppression
fi lters). The ECG then shows high impedance. A short
circuit between the lamp wires does not affect the ECG.
The ECG is not destroyed by the insulation test! A pre-
condition for this is that a maximum current value of
1 mA is not exceeded.
Caution:
Before commissioning the lighting installation, check that
N cable connections are in order! The neutral conductor
should never be interrupted while the lighting system is
operating.
2.2.3. Output voltage
During the operation of a high-pressure discharge lamp,
a general distinction is made between the ignition phase
and the normal operation of the ECG. During the ignition
phase some very high ignition voltages up to 4.5 kV may
occur temporarily at the outlet connection. In contrast,
the output voltage, which is measured during normal oper-
ation of a high-pressure discharge lamp at both output ter-
minals, is never higher than the U-OUT working voltage.
12
2.2.3.1. Lamp ignition voltage
POWERTRONIC
® ECGs use asymmetric ignition. For this
reason it is important to mark each lamp connection clearly.
A distinction should be made between the cable carrying
the high-voltage potential (25 kV), which is referred to a the
Lamp High (LH) and the second cable, also known as the
Lamp Low (LL), which has a substantially lower potential
(U-OUT) in comparison with the PE.
LH and LL are marked clearly on the device label.
LH should be kept as short as possible. In addition, with
Edison fi ttings it may be necessary to check that the
potential carrying cable is connected correctly.
2.2.3.2. Operating voltage (U-OUT)
U-OUT is a compulsory ECG marking according to Safety
Standard EN 61347-2-12.
In this context U-OUT indicates the largest effective
working voltage between
• The output terminals
• Each output terminal and the PE
in the normal operation of a high-pressure discharge lamp.
The output working voltage U-OUT is often designated
open circuit voltage.
The above information is important for all components that
are electrically wired or connected between the ECG and
the lamp.
The components such as lamp cables, lamp sockets
(EN 60061-2), insulation parts and all other components
that may come into contact with the ECG output terminals
must be designed for the following voltages:
• For the LL connection the U-OUT working voltage
• For the LH connection the ignition voltage
As an ECG manufacturer, OSRAM ensures that no higher
voltage is to be expected at the output terminals than the
ones described above against any other potentials or
against the PE; e.g at the refl ector. For this reason, no
additional voltage reserve need be considered.