|
PCA2 - On-Load Protection Condition
Analyser
 |
• Quick, simple ON-LOAD or
OFF-LOAD injection & trip testing
• Tests Relay,
Breaker and Battery simultaneously
• Captures critical
‘first trip’
• 25A high power intelligent current
source
• Injects a precise current into relay
independently of the actual load current
• Records
entire protection operation sequence: relay, breaker trip and
reclose
• Built-in printer for on-site hardcopy
• PC data transfer via supplied USB flash
drive |
Developed in conjunction with a major European
utility, the PCA2 is a complete substation protection performance
evaluation and recording system. It tests several elements of the
protection system (Relay, Breaker & Battery) simultaneously. Its
advanced software-controlled current source can inject a precise
current into the relay even whilst the system is ON-LOAD. The
critical ‘first-trip’ of both relay and breaker can then be captured
and analysed.
It is well known that some relays and breakers
can become sluggish after a long period of inactivity. The ideal way
to test any protection system is to simulate the precise conditions
that occur during a fault whilst simultaneously recording its
performance. Performing such a test on a system that has not
operated for a long time then yields very useful data as to how the
system would perform given a real fault.
Traditionally the
different protection parts (relay, breaker & battery) have been
tested individually with the circuit first being taken off-line
manually. Modern maintenance strategies call for quick non-intrusive
methods that can exercise and provide a secure digital record of the
performance of the entire protection system with minimal outage
times.
As well as operate times, the battery voltage and
trip-coil current profile can also be recorded providing data on
vital aspects of breaker and overall protection system condition.
The PCA2 is a key tool that enables a truly cost-effective
Reliability Centred Maintenance Program (RCM) for substation
protection.
Features
Current Output
(General-Purpose Current
Mode)
- 0-25A Range
- ±45V peak Compliance
Voltage
- Duty cycle: 250VA or 10A
(continuous), 500VA or 25A for 30sec.
- <0.5% Magnitude Error Typ.,
1% Max, <0.2% Distortion DC-1kHz with 0.001 Hz Freq
Resolution,
< ±50 ppm (< ± 0.005%) Freq
Error
- Injection start synchronised
with zero crossing and data recording
|
Inputs
2x Current & 4x
Voltage/Contact
(Voltage/contact channels can also be used
to measure current
via additional CT-HE2A clip-on Hall
probes)
Current
Input (via use of CT-HE2A clip-on Hall probe)
- Resolution: 16-bits
(15+sign)
- Range: +/-35A (25 RMS)
- Bandwidth: DC to 4kHz
|
Current Output
(ON-LOAD
Mode)
Specs as above
except for:
- Software automatically
phase-locks (45-65Hz) and instantly
corrects for any
load-current variation during injection.
Time Resolution/Sampling
Rate
- 10,000 samples/sec
- ±0.1msec resolution
Physical
- 274x247Wx180m
- 9.5kg Weight
Interfaces
- 10/100Mbs Ethernet
- 2x USB (for MemoryStick,
Barcode-reader, ext. Printer, etc.)
- 15way expansion connector for
future expansion devices
|
Voltage/ Contact
Inputs
Each is
software selectable for either voltage or contact mode.
Can
be used to measure & record any arbitrary voltage or
contact
(e.g. battery voltage, relay trip contacts, breaker
auxiliary contacts
on-line or main breaker contacts during
off-line testing)
Voltage Mode
- Resolution: 16-bits
(15+sign)
- Range: +/-10V &
+/-300V
- Bandwidth: DC to
4kHz
Contact Mode
- Software selectable as
wet/dry, contact/2.5-300V AC/DC voltage
- Records actual contact voltage
over time (not just on/off status)
Current Mode
(via
additional CT-HE2A clip-on Hall probes)
- Specs as for dedicated current
input above
- Protected against wrong polarity
or incorrect wet/dry selection
|
Input Power
- 95-260VAC input / 45-65Hz
AC
- 40W no load, 600W continuous
max
|
Environmental
- 0-50°C Operating
Temperature
- 5-95% Relative humidity
(non-condensing)
- IP65 Protected Enclosure (when
closed), airtight, watertight.
- CE Marked, Tested to EN50081-2
(emissions) & EN50082-2 (susceptibility)
|
Download the full PCA 2 brochure 
 Download FREE PDF reader
|
|
| 
| 
| 
