how can i tell what the ratio is? or better yet, what is the nominal ratio of this current transformer? thanks

The ratio is exactly 1000:1. So 1 amp passi g through the center hole will induce a current of 1 mliamp in the secondary. If you connect a 10 Ohm resistor across the secondary., you would get 10 .mllivolts across the resistor. 100 amps would produce 1 volt. A 1/4 watt resistor is big enough.

Will these work with the shelly em? will it work in conjunction with shelly on p2 probes?

Yes, it will work because they both operate under the same principle for measuring current signals. It's just another brand of CT with a higher current rating.

Details says internal resistance is 10ω, but my multimeter says 54ω when measuring between the ends. it accurately measures other ω. is this expected?

Not expected, it is detected in real time. The actual resistance is about 54Ω.

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PZCT-02 Split Core Current Transformer Coil Sensor for 100A Meter

PZCT-02 Split Core Current Transformer Coil Sensor for 100A Meter

Product ID: 82356598

Details

Brand
Hilitand
Current Rating
100 Amps
Item Weight
2.08 ounces
Mounting Type
Cable Mount
Specification Met
UL

⚡100A current rating

🔄Snap joint for tool-free install

🛡️0.5 accuracy & strong isolation

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Rp549056

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Sold byAmazon IndonesiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

⚡ Snap, Monitor, Optimize — Power Your Efficiency!

BUILT FOR DURABILITY - Fully enclosed with robust mechanical and environmental resistance for long-term use.
COMPACT YET POWERFUL - Mini split core design fits tight spaces without compromising performance.
PRECISION YOU CAN TRUST - 0.5 grade accuracy ensures reliable energy monitoring for your smart setups.
UNIVERSAL COMPATIBILITY - Works seamlessly with 220V and 380V AC power supplies—versatility for any project.
EFFORTLESS SNAP ON INSTALLATION - Clamp around cables without disconnecting—save time and avoid hassle.

The PZCT-02 Split Core Current Transformer is a compact, lightweight sensor designed for easy snap-on installation around cables up to 16mm diameter. Rated for 100A with 0.5 accuracy, it offers reliable current measurement for energy meters in both 220V and 380V AC systems. Its fully enclosed design ensures strong voltage isolation and durability, making it ideal for professional energy monitoring and management.

Specifications

ASIN	B07G16GBMS
Best Sellers Rank	#390,049 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #13 in Current Transducers
Brand	Hilitand
Brand Name	Hilitand
Current Rating	100 Amps
Customer Reviews	4.3 out of 5 stars 58 Reviews
Item Weight	0.13 Pounds
Manufacturer	Hilitand
Maximum Frequency	60 Hz
Minimum Frequency	50 Hz
Model	PZCT-02
Mounting Type	Cable Mount
Part Number	Hilitandy4segzoq1u
Specification Met	UL
UPC	792172983594 700890345150

Reviews

H**L

11.01.2022

J**N

22.05.2024

W**S

21.11.2023

N**Y

6.11.2018

D**N

1.02.2024

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