22
GMC-I Messtechnik GmbH
If the
Pon RCL
function is active, the output is automatically
reactivated after the device has returned to its normal
operating temperature.
Functions which may influence the status of the output
include:
4.4 Limiting the Allowable Working Range: Ulim, Ilim
Allowable setting limits for voltage and current can be restricted in
order to assure ideal matching to the working ranges of the
connected power consumer. The Ulim and Ilim setting functions
are provided to this end. Setting options can be selected with the
respective <SELECT> key. Setting resolution is selected with the
<RESOL> key. The setting itself is entered with the scroll keys.
New settings become immediately active.
Attention!
These settings represent so-called soft limits. This means that
values can be selected both manually and via the computer
interface which lie within these limit values, and that a
corresponding error message is otherwise generated.
Attention!
The actual output quantity is the sum of the digitally selected
setpoint value and the setpoint value specified via the analog
interface. This makes it possible to select values which exceed
the specified soft limit.
Ulim – Setting the Upper Voltage Limit Value
Functions
•
Upper setting limit
(soft limit) for
Uset
•
Prevents inadvertent violation of the maximum voltage value
when adjusting
Uset.
•
Protection
for the connected power consumer
•
Ulim
has higher priority than
Uset.
•
Manual and computer-aided settings for
Uset
may not exceed
Ulim
.
•
Ulim
cannot be set to a value which is less than a previously
selected
Uset
value.
Uset
must be reduced far enough to allow
for the new
Ulim
setting.
Settings
See description on page 25.
Ilim – Setting the Upper Current Limit Value
Functions
•
Upper setting limit
(soft limit) for
Iset
•
Prevents inadvertent violation of the maximum current value
when adjusting
Iset.
•
Protection
for the connected power consumer
•
Ilim
has higher priority than
Iset.
•
Manual and computer-aided settings for
Iset
may not exceed
Ilim
.
•
Ilim
cannot be set to a value which is less than current
setpoint
Iset
.
Iset
must be reduced far enough to allow for the
new
Ilim
setting.
Settings
4.5 Description of OVP and OCP Protection Functions
Protection for the connected power consumer and the
KONSTANTER by means of the following functions:
OVP – overvoltage protection
Functions
•
Protection
for the connected power consumer
•
If voltage at the output terminals exceeds the selected
OVP
value, the power output is deactivated.
•
Triggering of overvoltage protection causes immediate (< 200
s) deactivation of the output (
OUTPUT OFF
). The HF power
transmitter is disabled, and the electronic sink for discharging
the output capacitors for approximately 350 ms is activated.
In addition, bit 4 (OVPA) is set in event register A. Bit 4 remains
set in status register A for as long as the trigger value is
exceeded.
•
The
CV
LED blinks as soon as overvoltage protection
OVP
is
triggered (see also chapter 3
[3]
), and the
red OUTPUT
LED
goes out.
•
As soon as the shutdown condition no longer exists, the
power output can be reactivated by pressing the
<OUTPUT>
key,
by transmitting a
trigger signal
to the analog interface
or by
means of
computer control
(“
OUTPUT
ON
”
➅
red
OUTPUT
LED
lights up).
Settings
OCP – Overcurrent Protection
Functions
•
Protects
the power consumer from continuous overcurrent.
•
Deactivates the power output when load current
Iset
has been
reached, and the output is switched to the
current regulating
mode
.
•
Current can nevertheless be allowed to exceed Iset for
specified, short periods of time by specifying a delay time (see
below), for example:
!
Starting current for electric motors
!
In-rush current for capacitive power consumers
!
For testing the breaking performance of circuit breakers,
motor protecting switches, fuses etc.
!
For determining the short-term load capacity of contacts
and cables, as well as electrical and electronic
components
!
In order to maintain short response times when
programming voltage increases
•
The
CC
LED blinks as soon as overvoltage protection
OCP
is
triggered (see also chapter 3
[3]
), and the
red OUTPUT
LED
goes out.
•
The power output can be reactivated at any time by pressing
the
<OUTPUT> key,
by transmitting a
trigger signal
to the analog
interface
or by means of
computer control
(
OUTPUT
ON
➅
red
OUTPUT
LED lights up).
Settings
Functions
Meaning
Manual
Operation
Remote
Operation
OVP (OVSEt)
Overvoltage
protection
OCP
Overcurrent
protection
Pon
(POWER_ON)
SEq
Sequence
trG (T_MODE)
Содержание SSP 120 Series
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