I. Core Specifications (Essential for Foreign Trade Quotation / Logistics)
Table
Item Authoritative Parameters Brand / Model
Schneider Electric LRD16C (TeSys D Series)
Product Type
3-Pole Differential Thermal Overload Relay (Dedicated for Motor Protection)
Setting Current Range
9–13A (Adjustable with white knob)
Trip Class
Class 10A (Fast tripping, approximately 7.2s operation for 1.5 times current)
Auxiliary Contacts
1NO + 1NC (95-96 Normally Closed, 97-98 Normally Open)
Contact Capacity
13A / 690V AC
Installation Method
Directly mounted below LC1-D12～D38 contactors; Independent DIN rail (TH35) mounting
Reset Method
Manual (H) / Automatic (A) optional (blue reset button)
Physical Dimensions
45 (W) × 66 (D) × 70 (Height) mm
Net Weight / Gross Weight
Approx. 0.124 kg / Approx. 0.16 kg
Protection Rating
IP20 (for use in control cabinets)
Operating Temperature
-20℃～+60℃ (wide temperature range)
Storage Temperature
-40℃～+85℃
Certifications
CE, UL 61010, CSA, RoHS, Green Premium
Country of Origin
France
II. Logistics and Customs Clearance Key Points (Foreign Trade Practice)
1. Dangerous Goods Attributes: None (no batteries, no capacitors, general cargo).
2. Customs Code (HS): 8536300000 (thermal overload relay, for motor protection).
3. Packaging Specifications: Original cardboard box, 1 unit/box, 33 units/carton; single unit volume approximately 0.00021 m³ (45×66×70mm). 4. English Customs Declaration Description: Schneider Electric TeSys D Thermal Overload Relay, 3-Pole, 9–13A Adjustable, Class 10A, 1NO+1NC Auxiliary Contacts, Direct Mount on LC1-D12–D38 Contactors or DIN Rail, IP20, for AC Motor Protection.
III. Core Functions and Operation (Essential for On-site Commissioning)
1. Key Protection Features
• Differential Bimetallic Strip: Accurately detects three-phase current imbalance (phase loss) and overload, with built-in temperature compensation, ensuring stable protection accuracy over a wide temperature range.
• Class 10A Fast Tripping: No tripping within 1.05×Ir 2h; tripping within 1.2×Ir 2h; tripping approximately 7.2s within 1.5×Ir, quickly protecting the motor windings.
• Phase Loss Protection: Quickly trips when any phase current is abnormal, preventing motor burnout due to phase loss.
• Test/Indication: Built-in test button and trip indicator (T) to simulate fault verification circuit; red stop button forcibly disconnects normally closed contacts.
• Lead Seal Lock: Front cover with lead seal hook to prevent parameters from being accidentally adjusted.
2. Operation Panel (LRD16C Standard Layout)
Table
Components
Function
White scale knob
Setting current Ir (9–13A)
Toggle window
Test button + Trip indicator (T)
Red button
Stop (Forced disconnect 95-96)
Blue button
Reset (Manual reset)
H/A switch
Manual/automatic reset selection
Lead seal hook
Lock setting parameters
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