Product Specifications
| Prod Model: |
LT47 |
| Markets: |
North America,South America,Eastern Europe,Southeast Asia,Africa,Oceania,Mid East,Eastern Asia,Western Europe |
Product Description
LT47 Electronic Over Current Relay
Presentation
LR97 D and LT47 electronic over current relays have been developed to satisfy machine protection requirements.
These relays have definite time characteristics: Current threshold and time based function.
They are particularly recommended for providing mechanical protection on machines with high resistive torque, high
Inertia and with strong probability of jamming under steady state conditions.
They can be used for motor protection in the case of long starting times or frequent starting.
The LR97 D relay also incorporates two fixed time protection functions, one of 0.5 seconds against locked rotor and
One of 3 seconds against phase failure.
LR97 D and LT47 can be used to provide mechanical shock protection. In this case, setting the O-Time knob to
Minimum will ensure tripping in 0.3 seconds.
Applications
LR97 D and LT47 relays are particularly suitable for the following machines:
Monitoring function for excessively long starting time on machines with a risk of difficult starting:
Machines with high resistive torque, high inertia machines.
Monitoring of machines during steady state operation: Overtorque detection function
Machines with strong risk of jamming, machines with torque build-up over time,
Mechanical failure monitoring,
Faster detection of malfunctioning on machines where the motor is oversized in relation to its thermal protection I² T.
Motor protection for specific applications:
Machines with long starting times,
Machines with high on-load factor: More than 30 to 50 starts/hour,
Machine with fluctuating load from a steady state, where the thermal image of a thermal overload relay (thermal
Memory) is unsuitable in relation to actual overheating of the motor.
Examples of machines:
Conveyors, crushers and mixers,
Fans, pumps and compressors,
Centrifuges and spin-dryers,
Presses, shearing machines, saws, broaching machines, sanders and lifting hoists.
Relay
setting range |
Usable
range (1) |
Relay
supply voltage |
Reference |
Weight |
|
A |
A |
|
|
KG |
|
LT47 relay with manual/electric reset |
|
0.5… 6 |
0.5… 5 |
a 200… 240 V |
LT47 06M7S |
0.192 |
|
a 100… 120 V |
LT47 06F7S |
0.192 |
|
c/a 24 V |
LT47 06BS |
0.192 |
|
c/a 48 V |
LT47 06ES |
0.192 |
|
3… 30 |
3… 25 |
a 200… 240 V |
LT47 30M7S |
0.192 |
|
a 100… 120 V |
LT47 30F7S |
0.192 |
|
c/a 24 V |
LT47 30BS |
0.192 |
|
c/a 48 V |
LT47 30ES |
0.192 |
|
5… 60 |
5… 60 |
a 200… 240 V |
LT47 60M7S |
0.192 |
|
a 100… 120 V |
LT47 60F7S |
0.192 |
|
c/a 24 V |
LT47 60BS |
0.192 |
|
c/a 48 V |
LT47 60ES |
0.192 |
|
LT47 relay with automatic reset |
|
0.5… 6 |
0.5… 5 |
a 200… 240 V |
LT47 06M7A |
0.192 |
|
a 100… 120 V |
LT47 06F7A |
0.192 |
|
c/a 24 V |
LT47 06BA |
0.192 |
|
c/a 48 V |
LT47 06EA |
0.192 |
|
3… 30 |
3… 25 |
a 200… 240 V |
LT47 30M7A |
0.192 |
|
a 100… 120 V |
LT47 30F7A |
0.192 |
|
c/a 24 V |
LT47 30BA |
0.192 |
|
c/a 48 V |
LT47 30EA |
0.192 |
|
5… 60 |
5… 60 |
a 200… 240 V |
LT47 60M7A |
0.192 |
|
a 100… 120 V |
LT47 60F7A |
0.192 |
|
c/a 24 V |
LT47 60BA |
0.192 |
|
c/a 48 V |
LT47 60EA |
0.192 |
|
Accessories (to be ordered separately) |
|
Description |
For
use with |
Sold in
lots of |
Unit
reference |
Weight
kg |
Pre-wiring kits allowing connection of
the LR97 D relay N/C contact directly
to the contactor |
LC1 D09… D18 |
10 |
LAD 7C1 |
0.002 |
|
LC1 D25… D38 |
10 |
LAD 7C2 |
0.003 |
|
|
|
|
|
Terminal block for clip-on mounting on
35 mm rail (AM1 DP200) |
LR97 D |
1 |
LAD 7B106 |
0.100 |
|
|
|
|
|
Zhejiang Huayang Electric Co., Ltd. Specializes in manufacturing the Electronic overload Relays, Thermal Overload Relays, Electronic Voltage Relays, Other Protection & Monitoring Devices, Current Transformers, Shunt and any other electrical equipments. After several years' development, Vaya has become a larger enterprise combining research, production, sales and after-sales service of electronic relay and is one of the famous manufacturers in China. All of our production procedures are strictly followed ISO 9001. We also get across safety certification such as CE, CB, UL, CCC, etc. We are sure that we can offer you the product with good quality as well as competitive price as we have advanced technology and prefect testing equipments, with Up-To-Date machines and production.
Thanks to the perfect character, good service, and high quality, our products are well sold both in domestic and oversea markets, and highly praised by the clients. With the principle of quality, technology and credit, we insist on "Talents Is Our Base, Technique is the Source of Enterprise Development". And always continually research and develop new products to meet the clients' need. Look forward to establishing a long term business relationship with you!
