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SE-330AU-23-01

Description
Safety Relays EARTHING RES MON 48VDC N-NET NC
CategoryTopical application    Mechanical and electrical/engineering/automation   
File Size214KB,1 Pages
ManufacturerLittelfuse
Websitehttp://www.littelfuse.com
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Safety Relays EARTHING RES MON 48VDC N-NET NC

SE-330AU-23-01 Parametric

Parameter NameAttribute value
Product AttributeAttribute Value
ManufacturerLittelfuse
Product CategorySafety Relays
PackagingBulk
Factory Pack Quantity1
Protection Relays & Controls
Neutral-Earthing-Resistor Monitoring
SE-330AU SERIES
Neutral-Earthing-Resistor Monitor - New Revision
Description
The SE-330AU is an advanced earth-fault and earthing-resistor
monitoring relay for low- and medium-voltage transformers and
generators. It monitors neutral current, neutral-to-earth voltage,
and neutral-to-earth resistance. It provides continuous
monitoring of the neutral-to-earth path to verify that the neutral-
earthing resistor (NER) is intact. This is of utmost importance—
an open NER renders current-sensing earth-fault protection
inoperative and could result in a false belief that the system is
functioning properly. The SE-330AU earth-fault function complies
with AS/NZS 2081.3:2002. Outputs include four relay outputs,
and an analog output. A mini USB port is included to view
measured values, configure settings, and check event records.
An on-board micro SD card can be used for long-term data
logging. Network communications options are available. For
non-AS/NZS 2081 applications, see the SE-330 or SE-330HV.
Resistor Monitoring
Simplified Circuit Diagram
The SE-330AU combines the measured values of resistance,
current, and voltage to continuously determine that the NER is
intact. It is able to detect a resistor failure with or without an
earth fault present. Sensing resistors are matched to the system
voltage and are used to monitor NGRs on systems up to 35 kV.
CT
B
ER SERIES
(Sensing Resistor)
Earth-Fault Monitoring
SE-330AU
SERIES
L1
L2
(NER Monitor)
NER
A
The SE-330AU uses a 5- or 30-A-primary current transformer to
provide a pickup-setting range of 0.125 to 5 A or 0.75 to 30 A to
comply with AS/NZS 2081.3:2002. DFT filtering ensures that
false trips due to harmonic noise from adjustable-speed drives
do not occur. Open-CT detection is provided.
Accessories
A
K4 UNIT HEALTHY
CONTACT
Ordering Information
ORDERING
NUMBER
POWER
SUPPLY
COMM
ER Series Sensing Resistor
Required interface between the power system
and the SE-330AU. Eliminates hazardous voltage
levels at the relay.
EFCT Series Earth-Fault Current Transformer
Sensitive earth-fault current detection (5 A primary).
SE-CS30 Series Earth-Fault Current Transformer
SE-330AU -
X
X
-
0
X
SE-330AU
for all apps.
35 kV or less
SE-330HV
for 72 kV
apps.
0=USB Only
1=DeviceNet
3=EtherNet
(Dual RJ45)
4=EtherNet
0=120/240 (SC Fiber & RJ45)
Vac/Vdc 5=EtherNet
(Dual SC Fiber)
2=48 Vdc 6=IEC61850
(Dual RJ45)
7=IEC61850
(SC Fiber & RJ45)
8=IEC61850
(Dual SC Fiber)
REQUIREMENT
B
Sensitive earth-fault current detection (30 A primary).
0=Normally Open
1=Normally Closed
Specifications
Input Voltage
Dimensions
GF Trip-Level Settings
GF Trip-Time Settings
Vn Trip-Level Settings
Output Contacts
Operating Mode
Harmonic Filtering
Reset
Approvals
Communications
Analog Output
Conformal Coating
Warranty
Mounting
See ordering information
H
213 mm (8.4”),
W
98 mm (3.9”),
D
132 mm (5.2”)
0.125 to 30 A
0.1 to 0.5 s
20-2,000 Vac (≤5 kV systems)
100-10,000 Vac (>5 kV systems)
Two Form A, Two Form C
Fail-Safe
Standard feature
Front panel push button and remote input
C-Tick (Australian), CE
Mini USB (standard); DeviceNet (optional), IEC 61850
(optional), Modbus TCP and EtherNet/IP (optional)
ACCESSORIES
ER Series Sensing Resistor
Current Transformer
SE-IP65CVR-G
SE-MRE-600
RK-332
Required
Required
Optional
Optional
Optional
4-20 mA, self or loop powered
Standard feature
5 years
Panel, Surface (optional)
© 2015 Littelfuse Protection Relays & Controls
Littelfuse.com/se-330au
Rev: 4-D-092915
Based on Manual Rev: 4-E-091115

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Product Attribute Attribute Value Attribute Value Attribute Value Attribute Value Attribute Value Attribute Value Attribute Value
Manufacturer Littelfuse Littelfuse Littelfuse Littelfuse Littelfuse Littelfuse Littelfuse
Product Category Safety Relays Safety Relays Safety Relays Safety Relays Safety Relays Safety Relays Safety Relays
Packaging Bulk Bulk Bulk Bulk Bulk Bulk Bulk
Factory Pack Quantity 1 1 1 1 1 1 1
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